Species in theArctic
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Species in the Arctic

Note: The list below is incomplete. You can assess the extent of its coverage by examining the references we used to assign species to this ecosystem. Note, however, that there are too many species of invertebrates for
SeaLifeBase to provide you with complete species lists. You may be able to help us more on this list by sending us Internet sources or published references that we have not yet used for this ecosystem.
We will encode this material, and credit you for providing it.
     n= 2813 (Incomplete)
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Species Name Family Habitat Length (cm) Trophic Level Status
Aartsenia candida Pyramidellidae demersal 1.0 DL native
Abietinaria abietina Sea fir Sertulariidae sessile native
Abietinaria pulchra Sertulariidae sessile native
Abietinaria turgida Sertulariidae sessile native
Abyssocucumis abyssorum Cucumariidae benthic native
Abyssoninoe abyssorum Lumbrineridae benthic native
Abyssoninoe scopa Lumbrineridae benthic native
Acanthephyra acanthitelsonis Spinytailed deepsea pelagic shrimp Acanthephyridae pelagic native
Acanthephyra acutifrons Sharp-nosed deep-sea shrimp Acanthephyridae pelagic 3.3 native
Acanthephyra armata Acanthephyridae pelagic 20.0 TL native
Acanthephyra brevirostris Acanthephyridae bathypelagic native
Acanthephyra eximia Dressed deep-sea shrimp Acanthephyridae pelagic 3.7 native
Acanthephyra pelagica Acanthephyridae bathypelagic native
Acanthephyra purpurea Purple deep-sea shrimp Acanthephyridae pelagic native
Acanthephyra stylorostratis Acanthephyridae bathypelagic 4.0 native
Acanthocardia echinata European prickly cockle Cardiidae benthic 7.5 SHL 2.0 native
Acanthodoris pilosa Hairy spiny doris Onchidorididae benthic 2.0 TL native
Acanthonotozoma inflatum Iphimediidae benthic native
Acanthonotozoma serratum Iphimediidae benthic native
Acanthostepheia behringiensis Oedicerotidae benthic native
Acanthostepheia malmgreni Oedicerotidae benthic native
Acanthostomella norvegica Not assigned pelagic native
Acartia bifilosa Acartiidae pelagic native
Acartia hudsonica Acartiidae pelagic native
Acartia longiremis Acartiidae pelagic native
Acartia tumida Acartiidae pelagic native
Aceroides latipes Oedicerotidae benthic native
Acerotisa arctica Euryleptidae benthic native
Acetes americanus Aviu shrimp Sergestidae pelagic native
Achelia alaskensis Ammotheidae benthic native
Achelia borealis Ammotheidae benthic native
Achelia spinosa Ammotheidae benthic native
Achramorpha ingolfi Achramorphidae sessile native
Acirsa borealis Chalky wentletrap Epitoniidae benthic 3.3 DL native
Acrorhynchides caledonicus Polycystididae benthic native
Acrorhynchides robustus Polycystididae benthic native
Actinauge abyssorum Hormathiidae sessile native
Actinauge cristata Hormathiidae sessile native
Actinauge verrilli Reticulate anemone Hormathiidae sessile native
Actinocythereis dunelmensis Trachyleberididae benthic native
Actinoposthia caudata Childiidae demersal native
Actinostola abyssorum Actinostolidae sessile native
Actinostola callosa Rough-skinned sea anemone Actinostolidae sessile native
Actinostola spetsbergensis Actinostolidae sessile native
Adalaria proxima Yellow false doris Onchidorididae benthic 2.0 TL native
Adalaria rossica Onchidorididae benthic native
Admete couthouyi Cancellariidae benthic native
Admete regina Noble Admete Cancellariidae benthic native
Admete viridula Northern admete Cancellariidae benthic 2.3 DL native
Aeginella spinosa Caprellidae benthic native
Aeginina longicornis Caprellidae benthic native
Aeginopsis laurentii Golf tee medusa Aeginidae pelagic 2.5 WD native
Aeginura grimaldii Aeginidae pelagic 4.5 WD native
Aeolidia papillosa Shag-rug aeolis Aeolidiidae benthic 10.0 TL 3.6 native
Aeropsis rostrata Aeropsidae benthic native
Aethia cristatella Crested auklet Alcidae others 23.0 TL 3.6 native
Aethia psittacula Parakeet auklet Alcidae others 4.0 native
Aethia pusilla Least auklet Alcidae others 15.0 TL 3.8 native
Aetideopsis armata Aetideidae pelagic native
Aetideopsis minor Aetideidae pelagic native
Aetideopsis rostrata Aetideidae pelagic native
Agalma elegans Agalmatidae pelagic native
Agathotanais ingolfi Agathotanaidae benthic native
Aglantha digitale Pink helmet Rhopalonematidae pelagic native
Aglaophamus malmgreni Nephtyidae benthic 10.0 TL native
Aglaophamus neotenus Nephtyidae benthic native
Akanthophoreus gracilis Akanthophoreidae benthic native
Akera bullata Akeridae benthic native
Alaurina viridirostrum Microstomidae benthic native
Alca torda Razorbill Alcidae others 45.0 TL 4.2 native
Alcyonidium disciforme Alcyonidiidae sessile native
Alcyonidium gelatinosum Alcyonidiidae sessile native
Alcyonidium mamillatum Alcyonidiidae sessile native
Alcyonidium pedunculatum Smooth leather bryozoan Alcyonidiidae sessile native
Alcyonidium radicellatum Alcyonidiidae sessile native
Alcyonidium vermiculare Alcyonidiidae sessile native
Alderia modesta Modest alderia Stiligeridae benthic 0.1 TL native
Aldisa zetlandica Cadlinidae benthic native
Aleutihenricia beringiana Bering Henricia Echinasteridae benthic native
Alitta brandti Giant piling worm Nereididae benthic native
Alitta virens King ragworm Nereididae benthic native
Allantactis parasitica Parasitic sea anemone Hormathiidae sessile native
Alle alle Dovekie Alcidae others 25.0 TL 3.1 native
Allosergestes pectinatus Sergestidae pelagic 3.1 native
Allosergestes sargassi Sergestidae pelagic 3.1 native
Altelatipes carinatus Benthesicymidae benthic native
Alvania brychia Jan-mayan alvania Rissoidae benthic native
Alvania jeffreysi Rissoidae demersal 0.2 DL native
Alvania moerchi Rissoidae benthic native
Alvania moerchii Rissoidae demersal 0.3 DL native
Alvania punctura Rissoidae demersal native
Alvania scrobiculata Rissoidae demersal 0.3 DL native
Alvania verrilli Rissoidae demersal 0.3 DL native
Amage auricula Ampharetidae benthic native
Amalopenaeus elegans Benthesicymidae bathypelagic native
Amathillopsis spinigera Amathillopsidae benthic native
Amauropsis islandica Iceland moonsnail Naticidae demersal 4.0 DL native
Amicula vestita Mopaliidae benthic 6.0 TL native
Amonardia arctica Miraciidae benthic native
Ampelisca aequicornis Ampeliscidae benthopelagic native
Ampelisca amblyopsoides Ampeliscidae benthic native
Ampelisca declivitatis Ampeliscidae benthic native
Ampelisca eschrichti Ampeliscidae benthic Native
Ampelisca gibba Ampeliscidae benthic native
Ampelisca latipes Ampeliscidae benthic native
Ampelisca macrocephala Ampeliscidae benthic native
Ampelisca spinipes Ampeliscidae benthic 2.0 native
Ampelisca tenuicornis Ampeliscidae benthic 2.0 native
Ampharete acutifrons Ampharetidae benthic 2.0 native
Ampharete arctica Ampharetidae benthic native
Ampharete baltica Ampharetidae benthic native
Ampharete borealis Ampharetidae benthic native
Ampharete crassiseta Ampharetidae benthic native
Ampharete eupalea Ampharetidae benthic native
Ampharete finmarchica Ampharetidae benthic native
Ampharete goesi Ampharetidae benthic native
Ampharete johanseni Ampharetidae benthic native
Ampharete octocirrata Ampharetidae sessile native
Ampharete petersenae Ampharetidae benthic native
Ampharete reducta Ampharetidae benthic native
Ampharete vega Ampharetidae benthic native
Amphianthus margaritaceus Pearly sea anemone Hormathiidae sessile native
Amphiblestrum flemingii Calloporidae sessile native
Amphicteis gunneri Gunner's amphatretid worm Ampharetidae benthic native
Amphicteis mederi Ampharetidae benthic native
Amphicteis ninonae Ampharetidae benthic native
Amphicteis sundevalli Ampharetidae benthic native
Amphilectus digitatus Glove horny sponge Esperiopsidae sessile native
Amphilectus ovulum Beige horny sponge Esperiopsidae sessile native
Amphilochopsis hamatus Amphilochidae benthic native
Amphilochus tenuimanus Amphilochidae benthic native
Amphiodia craterodmeta Amphiuridae benthic native
Amphiophiura pachyplax Ophiuridae benthic native
Amphipholis squamata Dwarf brittle star Amphiuridae reef-associated 2.0 native
Amphiporus angulatus Chevron amphiporus Amphiporidae benthic native
Amphiporus bimaculatus Chevron ribbon worm Amphiporidae benthic 15.0 TL native
Amphiporus imparispinosus Pink-fronted ribbon worm Amphiporidae benthic native
Amphithopsis longicaudata Calliopiidae benthic native
Amphitrite birulai Terebellidae benthic native
Amphitrite cirrata Terebellidae sessile native
Amphiura denticulata Amphiuridae benthic native
Amphiura sundevalli Amphiuridae benthic native
Ampithoe rubricata Ampithoidae benthic native
Anaitides groenlandica Phyllodocidae benthic native
Anaperus tvaerminnensis Convolutidae benthic native
Anas platyrhynchos Mallard Anatidae others 3.5 native
Anaspio boreus Spionidae benthic native
Anatoma crispata Crispate scissurelle Anatomidae sessile 0.3 DL native
Anchistioides antiguensis Anchistioididae benthic native
Ancistrolepis magna Buccinidae benthic native
Ancistrosyllis groenlandica Pilargidae benthic native
Ancula gibbosa Atlantic ancula Goniodorididae benthic 2.5 TL native
Andaniopsis pectinata Stegocephalidae benthic native
Anisakis simplex Anisakidae host native
Anobothrus gracilis Ampharetidae benthic native
Anobothrus laubieri Ampharetidae benthic native
Anomalisipho verkruezeni Buccinidae benthic native
Anonyx compactus Uristidae benthic native
Anonyx debruynii Uristidae benthic native
Anonyx laticoxae Uristidae benthic native
Anonyx lilljeborgi Uristidae benthic native
Anonyx nugax Uristidae benthic native
Anonyx pacificus Uristidae benthic native
Anonyx sarsi Uristidae benthic native
Anoplodium chirodotae Umagillidae benthic native
Antalis antillaris Antillean tuskshell Dentaliidae benthic native
Antalis entalis Occidental tuskshell Dentaliidae benthic native
Antalis occidentalis Dentaliidae benthic native
Antho arctica Microcionidae sessile native
Antho dichotoma Microcionidae sessile native
Anthosactis janmayeni Jan mayen sea anemone Actinostolidae sessile native
Antinoella badia Polynoidae benthic native
Aphanostoma virescens Isodiametridae benthic native
Aphelochaeta marioni Cirratulidae benthic 2.0 native
Apherusa glacialis Calliopiidae benthic 2.0 native
Apherusa sarsi Calliopiidae benthic native
Aphrodita aculeata Sea mouse Aphroditidae benthic 20.0 TL 3.2 native
Apistobranchus tullbergi Apistobranchidae benthic native
Aplidiopsis pannosum Pale mushroom compound tunicate Polyclinidae sessile 4.0 COLD native
Aplidium glabrum Polyclinidae sessile 7.0 COLD native
Aplidium spitzbergense Polyclinidae sessile native
Aplysia punctata Spotted sea hare Aplysiidae benthic 20.0 TL 2.0 native
Aplysilla glacialis Keratose sponge Darwinellidae sessile native
Aplysilla sulfurea Darwinellidae sessile native
Apomatus globifer Serpulidae sessile native
Apomatus similis Serpulidae sessile native
Aporrhais serresiana De serre’s pelican’s foot Aporrhaidae benthic 5.0 DL native
Aquiloniella scabra Candidae sessile native
Arabella iricolor Opal worm Oenonidae benthic native
Archaphanostoma agile Isodiametridae benthic native
Archilopsis spinosa Monocelididae benthic native
Archilopsis unipunctata Monocelididae benthic native
Archisenia sibirica Pseudotachidiidae benthic native
Architeuthis dux Atlantic giant squid Architeuthidae bathypelagic 2,000.0 TL 4.4 native
Arctica islandica Ocean quahog Arcticidae benthic 13.0 SHL 2.0 native
Arctokonstantinus hardingi Arctokonstantinidae bathypelagic native
Arctolembos arcticus Aoridae benthic native
Arctonoe vittata Red-banded commensal scaleworm Polynoidae benthic native
Arctonula arctica Romancheinidae sessile native
Arcturus baffini Arcturidae benthic native
Arenaria interpres Ruddy turnstone Scolopacidae others native
Arenaria melanocephala Black turnstone Scolopacidae others native
Argestigens abyssalis Argestidae benthic native
Argestigens glacialis Argestidae benthic native
Argis dentata Arctic argid Crangonidae benthic native
Argis lar Kuro shrimp Crangonidae benthic native
Argissa hamatipes Argissidae benthic native
Argonauta argo Greater argonaut Argonautidae pelagic 72.6 TL 4.5 native
Ariadnaria borealis Boreal hairysnail Capulidae benthic 2.2 DL native
Ariadnaria densecostata Capulidae benthic native
Aricidea abranchiata Paraonidae benthic native
Aricidea albatrossae Paraonidae benthic native
Aricidea catherinae Paraonidae benthic native
Aricidea hartmanae Paraonidae benthic native
Aricidea jeffreysi Paraonidae benthic native
Aricidea nolani Paraonidae benthic native
Aricidea quadrilobata Paraonidae demersal native
Aricidea suecica Paraonidae benthic native
Aricidea uschakowi Paraonidae demersal native
Aristaeopsis edwardsiana Scarlet shrimp Aristeidae benthic 33.4 TL 4.0 native
Aristeus antillensis Purplehead gamba prawn Aristeidae benthic 19.3 TL native
Aristias microps Aristiidae benthic native
Aristias tumidus Aristiidae benthic native
Arrhinopsis longicornis Oedicerotidae benthic native
Arrhis phyllonyx Oedicerotidae benthic native
Artacama proboscidea Terebellidae benthic native
Artemisina lundbecki Microcionidae sessile native
Arvella faba Bean Crenella Mytilidae benthic 1.8 DL native
Asabellides sibirica Ampharetidae benthic native
Asbestopluma pennatula Feathered horny sponge Cladorhizidae sessile 10.0 H native
Asbestopluma ramosa Cladorhizidae sessile native
Ascaltis lamarcki Leucascidae sessile native
Ascarophis arctica Spiruridae host native
Ascarophis filiformis Spiruridae host native
Ascidia callosa Sea blister Ascidiidae sessile 2.9 TL native
Ascidia clementea Ascidiidae sessile 6.0 H native
Ascidia dijmphniana Ascidiidae sessile native
Ascidia obliqua Ascidiidae sessile 8.0 TL native
Ascidia prunum Plum-like ascidia Ascidiidae sessile native
Ascidia unalaskensis Ascidiidae sessile native
Ascorhynchus abyssi Ammotheidae benthic native
Astacilla boreaphilis Arcturidae benthic 1.0 BL native
Astacolus hyalacrulus Vaginulinidae benthic native
Astarte acuticostata Astartidae benthic native
Astarte borealis Boreal Astarte Astartidae benthic 5.1 SHL native
Astarte crassa Astartidae benthic endemic
Astarte crenata Crenulate Astarte Astartidae benthic 2.1 DL native
Astarte elliptica Elliptical Astarte Astartidae benthic 5.0 SHL native
Astarte esquimalti Wavy-line Astarte Astartidae benthic 1.8 SHL native
Astarte montagui Narrow-hinge Astarte Astartidae benthic native
Astarte sulcata Roundish grooved Astarte Astartidae benthic native
Astarte vaigati Astartidae benthic endemic
Astarte warhami Astartidae benthic endemic
Asterias amurensis North Pacific seastar Asteriidae benthic native
Asterias rathbuni Asteriidae benthic native
Astrononion hamadense Nonionidae benthic native
Astrorhiza arenaria Astrorhizidae benthic native
Astrorhiza limicola Astrorhizidae benthic native
Astrotorhynchus bifidus Trigonostomidae benthic native
Astyris rosacea Rosy Northern dovesnail Columbellidae benthic 1.3 DL native
Asychis biceps Maldanidae sessile native
Atlantopandalus propinqvus Pandalidae bathydemersal native
Atolla parva Atollidae pelagic native
Atolla tenella Atollidae pelagic native
Atrophia glacialis Lubbockiidae pelagic native
Attheyella nordenskioldii Canthocamptidae benthic native
Atylus carinatus Atylidae benthic native
Augaptilus glacialis Augaptilidae pelagic native
Augaptilus polaris Augaptilidae benthic native
Aulacofusus brevicauda Thick-ribbed whelk Buccinidae benthic native
Aurelia aurita Moon jelly Ulmaridae pelagic 3.3 native
Aurelia limbata Brownbranded moon jelly Ulmaridae benthopelagic native
Austroniscus norbi Nannoniscidae benthic native
Autolytus beringianus Syllidae benthic native
Axinella infundibuliformis Axinellidae sessile native
Axinopsida orbiculata Orbicular axinopsid Thyasiridae benthic native
Axinopsida serricata Lenticular axinopsid Thyasiridae benthic 0.8 SHL native
Axinulus careyi Thyasiridae benthic native
Axinulus cycladius Thyasiridae benthic native
Axionice flexuosa Terebellidae benthic native
Axionice maculata Terebellidae benthic native
Axiothella catenata Maldanidae demersal native
Baicalellia brevituba Provorticidae benthic native
Baicalellia strelzovi Provorticidae benthic native
Balaena mysticetus Bowhead whale Balaenidae pelagic 2,000.0 TL 3.3 native
Balaenoptera acutorostrata Northern minke whale Balaenopteridae pelagic-neritic 4.2 native
Balaenoptera borealis Sei whale Balaenopteridae pelagic 1,800.0 TL 4.0 native
Balaenoptera musculus Blue whale Balaenopteridae pelagic 3,300.0 TL 3.2 native
Balaenoptera physalus Fin whale Balaenopteridae pelagic 2,700.0 TL 4.3 native
Balanus balanus Rough barnacle Balanidae sessile native
Balanus crenatus Crenate barnacle Balanidae sessile 2.0 native
Balanus glandula Common acorn barnacle Balanidae sessile native
Balanus rostratus Rostrate barnacle Balanidae sessile native
Barantolla americana Capitellidae benthic native
Barentsia variarticulata Pedicellinidae benthic native
Bathothauma lyromma Lyre cranch squid Cranchiidae pelagic 20.0 ML 3.7 native
Bathoxiphus ensiculus Entalinidae benthic native
Bathyarca frielei Boreal bathyark Arcidae benthic 0.6 DL native
Bathyarca glacialis Glacial bathyark Arcidae benthic 1.9 DL native
Bathyarca pectunculoides Comb bathyark Arcidae benthic native
Bathybiaster vexillifer Astropectinidae benthic native
Bathycrinus carpenterii Bathycrinidae sessile native
Bathymedon obtusifrons Oedicerotidae benthic native
Bathypalaemonella serratipalma Bathypalaemonellidae benthic native
Bathypalaemonella texana Bathypalaemonellidae benthic native
Bathypelagobia polaris Lopadorrhynchidae benthic native
Bathyphellia margaritacea North Pole sea anemone Bathyphelliidae sessile native
Bathypolaria kondrashovi Polynoidae benthic native
Bathypolypus arcticus North Atlantic octopus Octopodidae benthic 10.0 ML 3.8 native
Bathypolypus bairdii Octopodidae benthic 20.0 TL 3.8 native
Bathypolypus pugniger Octopodidae benthic 15.0 TL native
Belknapchiton alveolus Leptochitonidae benthic 4.0 DL native
Bentheogennema borealis Northern blunt-tail shrimp Benthesicymidae pelagic native
Bentheogennema burkenroadi Burkenroad blunt-tail shrimp Benthesicymidae pelagic native
Bentheogennema intermedia Benthesicymidae pelagic-oceanic 3.4 native
Benthesicymus bartletti Bartlett's blunt-tail prawn Benthesicymidae benthic 11.5 TL native
Benthesicymus brasiliensis Benthesicymidae benthic 15.2 TL native
Benthesicymus cereus Benthesicymidae benthic 7.6 TL native
Benthesicymus iridescens Benthesicymidae benthopelagic 15.0 TL native
Benthoctopus leioderma Smoothskin octopus Octopodidae benthic native
Benthoctopus piscatorum Octopodidae bathypelagic native
Benthonectes filipes Benthesicymidae benthic native
Berardius bairdii Baird's beaked whale Ziphiidae pelagic 1,280.0 TL 4.5 native
Beringius behringi Behring's whelk Buccinidae benthic native
Beringius crebricostatus Thick-cord whelk Buccinidae benthic native
Beringius stimpsoni Stimpson's whelk Buccinidae benthic native
Beringius turtoni Buccinidae demersal 10.0 DL native
Beroe cucumis Pink slipper comb jelly Beroidae pelagic 15.0 H 3.4 native
Beroe ovata Brown comb jelly Beroidae pelagic 11.5 H 3.7 native
Biemna variantia Saucer-shaped horny sponge Desmacellidae sessile 15.0 H native
Bispira crassicornis Sabellidae benthic native
Boeckosimus affinis Lysianassidae benthic native
Boeckosimus brevicaudatus Lysianassidae benthic native
Boeckosimus edwardsi Lysianassidae benthic native
Boeckosimus plautus Lysianassidae benthic native
Bogasonia volutoides Cylichnidae benthic native
Bolinopsis infundibulum Northern comb jelly Bolinopsidae pelagic 15.0 H 3.4 native
Bolitaena pygmaea Pygmy pelagic octopod Bolitaenidae pelagic 11.5 ML 3.7 native
Bolocera tuediae Deeplet sea anemone Actiniidae sessile 3.5 native
Boltenia echinata Spiny-tipped tunicate Pyuridae sessile 2.0 WD native
Boltenia ovifera Stalked tunicate Pyuridae sessile 8.0 BL native
Boltenia villosa Spiny-headed sea squirt Pyuridae sessile 2.5 WD native
Bonellia viridis Green spoon worm Bonelliidae benthic 15.0 TL native
Boreacola maltzani Arctic montacutid Lasaeidae benthic native
Boreochiton ruber Northern red chiton Tonicellidae benthic 1.3 TL native
Boreohydra simplex Boreohydridae pelagic native
Boreomysis arctica Mysidae pelagic-oceanic native
Boreomysis nobilis Mysidae benthic native
Boreonymphon abyssorum Nymphonidae benthic native
Boreonymphon ossiansarsi Nymphonidae benthic native
Boreonymphon robustum Nymphonidae benthic native
Boreoscala greenlandica Greenland wentletrap Epitoniidae benthic 6.1 DL native
Boreotrophon clathratus Clathrate trophon Muricidae benthic 3.7 DL native
Boreotrophon pacificus Muricidae benthic native
Boreotrophon truncatus Bobtail trophon Muricidae benthic native
Boroecia borealis Halocyprididae benthic native
Boroecia maxima Halocyprididae pelagic native
Botrynema brucei Halicreatidae pelagic native
Botrynema ellinorae Halicreatidae pelagic native
Botryococcus braunii Dictyosphaeriaceae pelagic native
Bougainvillia principis Bougainvilliidae pelagic 1.0 WD native
Bougainvillia superciliaris Bougainvilliidae pelagic-neritic 0.9 WD native
Bowerbankia composita Vesiculariidae sessile native
Brachidontes adamsianus Adams mussel Mytilidae benthic native
Brachioteuthis riisei Common arm squid Brachioteuthidae pelagic-oceanic 17.0 ML 3.2 native
Brachycarpus biunguiculatus Twoclaw shrimp Palaemonidae benthic native
Brachydiastylis hexaceros Diastylidae demersal native
Brachydiastylis resima Diastylidae benthic native
Brachyphallus crenatus Hemiuridae host native
Brachyramphus brevirostris Kittlitz's murrelet Alcidae others 23.0 TL 4.2 native
Brada granosa Flabelligeridae benthic native
Brada granulata Flabelligeridae benthic native
Brada granulosa Flabelligeridae benthic native
Brada incrustata Flabelligeridae benthic native
Brada inhabilis Flabelligeridae benthic native
Brada nuda Flabelligeridae benthic native
Brada ochotensis Flabelligeridae benthic native
Brada rugosa Flabelligeridae benthic native
Brada villosa Flabelligeridae benthic native
Bradya longispinosa Ectinosomatidae benthic native
Bradya scotti Ectinosomatidae benthic native
Bradya typica Ectinosomatidae benthic native
Branchiomma arcticum Sabellidae benthic native
Branchiomma infarctum Sabellidae benthic native
Branta bernicla Brant Anatidae others native
Breitfussia schulzei Jenkinidae sessile native
Brinkmanniella macrostomoides Promesostomidae benthic native
Brisaster fragilis Schizasteridae benthic native
Bruzelia tuberculata Synopiidae benthic native
Buccinum angulosum Angular whelk Buccinidae benthic native
Buccinum belcheri Buccinidae demersal 5.6 DL native
Buccinum ciliatum Buccinidae benthic 3.2 DL native
Buccinum cyaneum Bluish whelk Buccinidae benthic 5.8 DL native
Buccinum finmarkianum Buccinidae demersal 8.0 DL native
Buccinum fragile Buccinidae benthic native
Buccinum glaciale Glacial whelk Buccinidae benthic 8.0 DL native
Buccinum hydrophanum Buccinidae benthic 7.0 DL native
Buccinum maltzani Buccinidae benthic native
Buccinum micropoma Berry whelk Buccinidae demersal 3.4 DL native
Buccinum nivale Buccinidae benthic 2.6 DL native
Buccinum physematum Buccinidae benthic native
Buccinum plectrum Sinuous whelk Buccinidae benthic 6.0 NG native
Buccinum polare Polar whelk Buccinidae benthic 6.7 DL native
Buccinum scalariforme Ladder whelk Buccinidae benthic 8.4 DL native
Buccinum sericatum Silky whelk Buccinidae demersal 4.5 DL native
Buccinum solenum Solen whelk Buccinidae benthic native
Buccinum tenellum Pleated whelk Buccinidae benthic native
Buccinum undatum Waved whelk Buccinidae benthic 10.2 SHL 3.4 native
Bucephala clangula Common goldeneye Anatidae others 49.0 TL 3.8 native
Bucephala islandica Barrow's goldeneye Anatidae others 4.1 native
Bugulopsis peachii Scrupocellariidae benthic native
Bulbus smithii Naticidae benthic 2.5 DL native
Bulbus striatus Naticidae benthic native
Bushiella granulata Serpulidae sessile native
Bushiella quadrangularis Serpulidae benthic native
Byblis crassicornis Ampeliscidae benthic native
Byblis erythrops Ampeliscidae benthic native
Byblis gaimardi Ampeliscidae benthic native
Byblis minuticornis Ampeliscidae pelagic native
Byblis pearcyi Ampeliscidae benthic native
Byblis serrata Ampeliscidae benthic native
Bylgides elegans Polynoidae benthic native
Bylgides groenlandicus Polynoidae benthic native
Bylgides sarsi Polynoidae benthic native
Byrsophlebs graffi Byrsophlebidae benthic native
Bythocaris biruli Hippolytidae benthic native
Bythocaris cryonesus Hippolytidae benthic native
Bythocaris curvirostris Hippolytidae benthic native
Bythocaris gracilis Hippolytidae benthic native
Bythocaris irene Hippolytidae benthic native
Bythocaris leucopis Hippolytidae benthic native
Bythocaris payeri Hippolytidae benthic native
Bythocaris simplicirostris Hippolytidae benthic native
Cadlina laevis White Atlantic Cadlina Chromodorididae benthic 3.0 TL native
Cadulus gracilis Gadilidae benthic native
Caecognathia bicolor Gnathiidae benthic native
Caecognathia elongata Gnathiidae benthic native
Caecognathia stygia Gnathiidae benthic native
Calanus cristatus Calanidae benthic native
Calanus finmarchicus Calanidae pelagic 2.4 native
Calanus glacialis Calanidae pelagic 2.0 native
Calanus hyperboreus Calanidae demersal 2.0 native
Calanus marshallae Calanidae benthic native
Calathura brachiata Leptanthuridae benthic native
Calidris alba Sanderling Scolopacidae others 22.0 TL 3.5 native
Calidris alpina Dunlin Scolopacidae others 23.0 TL 3.3 native
Calidris fuscicollis White-rumped sandpiper Scolopacidae others native
Calidris maritima Purple sandpiper Scolopacidae others 3.3 native
Calidris minuta Little stint Scolopacidae others 3.2 native
Calidris temminckii Temminck's stint Scolopacidae others native
Calliopius laeviusculus Calliopiidae benthic native
Calliostoma annulatum Purple-ringed topsnail Calliostomatidae benthic 3.0 SHD 3.2 native
Calliostoma ligatum Blue topsnail Calliostomatidae benthic 2.5 SHD 3.5 native
Calliostoma occidentale Boreal topsnail Calliostomatidae demersal 1.7 DL native
Callipallene acus Callipallenidae benthic native
Callopora craticula Calloporidae sessile native
Callopora obesa Calloporidae sessile native
Callorhinus ursinus Northern fur seal Otariidae bathydemersal 210.0 TL 4.5 native
Calonectris borealis Scopoli's shearwater Procellariidae others native
Calycella gracilis Campanulinidae pelagic native
Calycella syringa Creeping bell hydroid Campanulinidae sessile native
Calycidoris guentheri Onchidorididae benthic native
Calycopsis birulai Bythotiaridae pelagic native
Campanularia groenlandica Campanulariidae sessile native
Campanularia volubilis Campanulariidae sessile native
Campanulina pumila Campanulinidae sessile native
Campylaspis globosa Nannastacidae benthic native
Campylaspis rubicunda Nannastacidae benthic native
Candelabrum phrygium Candelabridae sessile 9.0 NG native
Canthocamptus glacialis Canthocamptidae benthic native
Capitella capitata Capitellidae benthic 8.0 TL 2.0 native
Caprella ciliata Caprellidae benthic native
Caprella dubia Caprellidae benthic 2.5 native
Caprella linearis Caprellidae benthic native
Caprella microtuberculata Caprellidae benthic native
Caprella rinki Caprellidae benthic native
Caprella septentrionalis Caprellidae benthic native
Carbasea carbasea Flustridae sessile native
Carcinus maenas Green crab Carcinidae benthic 6.0 CL 3.5 questionable
Cardiomya striata Striate Cardiomya Cuspidariidae benthic 1.9 DL native
Cartilagovelutina beringensis Velutinidae benthic native
Caspiocuma campylaspoides Pseudocumatidae demersal native
Cassidulina teretis Cassidulinidae benthic native
Catablema multicirratum Pandeidae pelagic 3.5 WD native
Catablema vesicarium Constricted jellyfish Pandeidae pelagic-neritic 2.5 WD native
Caulophacus arcticus Rossellidae sessile native
Cauloramphus cymbaeformis Hincksinidae sessile native
Cauloramphus intermedius Hincksinidae benthic native
Cellepora nodulosa Celleporidae sessile native
Cellepora smitti Celleporidae sessile native
Celleporina nordenskjoldi Celleporidae sessile native
Centromedon calcaratus Uristidae benthic native
Centromedon pumilus Uristidae benthic native
Centropages abdominalis Centropagidae demersal native
Centropages hamatus Centropagidae pelagic native
Cephalothrix linearis Cephalotrichidae benthic 15.2 TL native
Cepphus columba Pigeon guillemot Alcidae others 35.0 TL 4.2 native
Cepphus grylle Black guillemot Alcidae others 36.0 TL 3.5 native
Ceramaster granularis Goniasteridae benthic native
Ceratocephale loveni Nereididae benthic native
Ceratonotus tauroides Ancorabolidae benthic native
Ceratopera elegans Trigonostomidae benthic native
Ceratostoma foliatum Leafy hornmouth Muricidae benthic 9.0 SHL 3.2 native
Cercopagis pengoi Fish-hook water flea Cercopagididae pelagic 0.2 BL introduced
Cercops holbolli Paracercopidae benthic native
Cerebratulus fuscus Lineidae benthic native
Cerebratulus marginatus Lineidae benthic native
Cerebratulus montgomeryi Rose ribbon worm Lineidae benthic native
Ceriantheomorphe brasiliensis Cerianthidae reef-associated 24.0 TL native
Cerianthus lloydii Cerianthidae sessile 2.0 native
Cerianthus vogti Cerianthidae sessile native
Cerithiella metula Cerithiidae demersal 1.1 DL native
Cerithiella whiteavesi Cerithiidae benthic native
Cervinia magna Aegisthidae benthic native
Cerviniella arctica Aegisthidae benthic native
Cerviniella danae Aegisthidae benthic native
Cerviniella hitoshii Aegisthidae benthic native
Chaetoderma chistikovi Chaetodermidae benthic native
Chaetoderma glacialis Chaetodermidae benthic native
Chaetoderma intermedium Chaetodermidae benthic native
Chaetoderma nitidulum Chaetodermidae benthic 45.7 DL native
Chaetoderma productum Chaetodermidae benthic native
Chaetozone careyi Cirratulidae benthic native
Chaetozone jubata Cirratulidae benthic native
Chaetozone pigmentata Cirratulidae benthic native
Chaetozone ruffi Cirratulidae benthic native
Chaetozone setosa Cirratulidae benthic 2.0 native
Chauliopleona amdrupii Anarthruridae benthic 0.3 TL native
Chauliopleona hastata Anarthruridae pelagic 5.1 TL native
Cheilopora sincera Hippopodinidae sessile native
Cheliplana mamkaevi Cheliplanidae benthic native
Cheliplana stylifera Cheliplanidae benthic native
Chelyosoma inaequale Corellidae sessile native
Chelyosoma macleayanum Corellidae sessile native
Chelyosoma orientale Corellidae sessile native
Childia groenlandica Childiidae benthic native
Chionoecetes opilio Snow crab Oregoniidae benthic 13.7 CW 3.5 native
Chiridiella abyssalis Aetideidae benthic native
Chiridiella reductella Aetideidae benthic native
Chiridiella sarsi Aetideidae benthic native
Chiridius obtusifrons Aetideidae pelagic native
Chiridota discolor Chiridotidae benthic native
Chiridota laevis Chiridotidae benthic native
Chitinopoma serrula Serpulidae benthic native
Chlamys behringiana Bering scallop Pectinidae benthic native
Chlamys islandica Iceland scallop Pectinidae benthic 11.0 SHL 2.0 native
Chlamys pseudislandica Pectinidae benthic native
Chlamys rubida Reddish scallop Pectinidae benthic 7.0 SHD native
Chondrocladia concrescens Cladorhizidae sessile native
Chone cincta Sabellidae benthic native
Chone duneri Sabellidae sessile native
Chone fauveli Sabellidae benthic native
Chone filicaudata Sabellidae benthic native
Chone gracilis Sabellidae benthic native
Chone infundibuliformis Sabellidae benthic 7.0 TL native
Chone murmanica Sabellidae benthic native
Chone paucibranchiata Sabellidae benthic native
Chrysallida bjoernsoni Pyramidellidae demersal 0.2 DL native
Chrysallida eximia Pyramidellidae demersal 0.2 DL native
Chrysallida hoeisaeteri Pyramidellidae demersal 0.2 DL native
Chrysaora melanaster Pelagiidae pelagic 4.0 native
Chrystella finckhi Pickworthiidae demersal native
Chtenopteryx sicula Sicilian comb-finned squid Chtenopterygidae bathypelagic 4.0 native
Ciliatocardium ciliatum Hairy cockle Cardiidae benthic 7.0 SHL native
Ciliatovelutina lanigera Velutinidae demersal 1.8 DL native
Cima inconspicua Cimidae demersal 0.1 DL native
Cinetorhynchus rigens Mechanical shrimp Rhynchocinetidae benthic native
Cingula castanea Rissoidae benthic native
Cingula moerchi Rissoidae benthic native
Ciona intestinalis Sea vase Cionidae sessile 15.0 TL native
Cirratulus cirratus Cirratulidae benthic 2.0 native
Cirroteuthis muelleri Müller's cirroctopod Cirroteuthidae benthopelagic 150.0 TL native
Cirrothauma murrayi Murray’s cirroctopod Cirroteuthidae bathydemersal 100.0 TL native
Cistenides granulata Pectinariidae benthic native
Cistenides hyperborea Pectinariidae benthic native
Cladorhiza abyssicola Deep-water horny sponge Cladorhizidae sessile 7.5 H native
Cladorhiza arctica Cladorhizidae sessile native
Cladorhiza gelida Cladorhizidae sessile native
Clangula hyemalis Long-tailed duck Anatidae others 51.0 TL 3.4 native
Clathrina blanca Clathrinidae sessile native
Clavella adunca Lernaeopodidae host native
Clavularia arctica Arctic club coral Clavulariidae sessile native
Cleippides bicuspis Calliopiidae benthic native
Cleippides quadricuspis Calliopiidae benthic native
Cleippides tricuspis Calliopiidae benthic native
Clinocardium nuttallii Nuttall cockle Cardiidae benthic 14.0 SHL 2.0 native
Clinopegma magnum Helmet whelk Buccinidae benthic native
Clione limacina Common Clione Clionidae pelagic 4.0 DL 3.4 native
Clistosaccus paguri Clistosaccidae host native
Clymenura borealis Maldanidae demersal native
Clymenura polaris Maldanidae demersal native
Cnemidocarpa annectens Styelidae sessile native
Cnemidocarpa finmarkiensis Shiny Red Sea squirt Styelidae sessile 5.0 WD native
Cnemidocarpa rhizopus Styelidae sessile native
Coanicardita ventricosa Stout Cyclocardia Carditidae benthic native
Coelogynopora gynocotyla Coelogynoporidae benthic native
Coelogynopora schulzii Coelogynoporidae benthic native
Collastoma eremitae Umagillidae benthic native
Colossendeis angusta Colossendeidae benthic native
Colossendeis proboscidea Colossendeidae benthic native
Colus aphelus Oblique whelk Buccinidae benthic native
Colus brunneus Brown whelk Buccinidae demersal native
Colus gracilis Buccinidae benthic native
Colus holboelli Buccinidae benthic native
Colus holboellii Buccinidae demersal 7.0 DL native
Colus islandicus Iceland whelk Buccinidae benthic 12.0 DL native
Colus latericeus Buccinidae demersal 2.5 DL native
Colus martensi Marten's whelk Buccinidae demersal 1.0 DL native
Colus ombronius Shady whelk Buccinidae benthic native
Colus pubescens Hairy whelk Buccinidae benthic 8.0 DL native
Colus sabini Buccinidae benthic native
Colus stimpsoni Stimpson's Colus Buccinidae benthic 13.0 DL native
Colus turgidulus Buccinidae benthic 5.6 DL native
Conaperta flavibacillum Convolutidae benthic native
Convoluta chiridotae Convolutidae demersal native
Convoluta convoluta Convolutidae benthic 0.4 TL native
Cordylochele malleolata Callipallenidae benthic native
Corella borealis Corellidae sessile native
Corellopsis pedunculata Corellidae sessile native
Cornuspira foliacea Cornuspiridae benthic native
Cornuspira involvens Cornuspiridae benthic native
Cornuspiroides striolata Cornuspiridae benthic native
Corophium clarencense Corophiidae benthic native
Corophium crassicorne Corophiidae benthic native
Corymorpha groenlandica Corymorphidae sessile native
Corymorpha sarsii Corymorphidae benthic native
Coryne eximia Corynidae sessile 0.2 WD native
Coryne hincksii Corynidae sessile native
Coryne pusilla Corynidae sessile native
Corynoporella tenuis Bicellariellidae sessile native
Corynosoma semerme Polymorphidae host native
Corynosoma strumosum Polymorphidae host native
Cossura longocirrata Cossuridae benthic native
Cossura pygodactylata Cossuridae demersal native
Cranchia scabra Rough cranch squid Cranchiidae bathypelagic 20.0 ML 3.6 native
Crangon dalli Ridged Crangon Crangonidae benthic native
Craniella craniana Tetillidae sessile native
Craniella cranium Tetillidae sessile native
Craniella polyura Tailed globular horny sponge Tetillidae sessile native
Crassicardia crassidens Thick Cyclocardia Carditidae benthic native
Crassicardia crebricostata Many-rib Cyclocardia Carditidae benthic native
Crella pertusa Crellidae sessile native
Crella pyrula Pear-shaped horny sponge Crellidae sessile native
Crellomima imparidens Crellidae sessile native
Crellomima incrustans Crellidae sessile native
Crenella decussata Cross-sculpture Crenella Mytilidae benthic native
Cressa abyssicola Cressidae benthic native
Cribrilina spitzbergensis Cribrilinidae sessile native
Cribrilina watersi Cribrilinidae sessile native
Cribrinopsis similis Actiniidae sessile 3.5 native
Cribroelphidium subarcticum Elphidiidae benthic native
Cribrostomoides jeffreysii Lituolidae benthic native
Cribrostomoides subglobosum Lituolidae benthic native
Crisia denticulata Crisiidae sessile native
Crisia eburnea Crisiidae sessile native
Crisia eburneo-denticulata Crisiidae sessile native
Crisiella complecta Crisiidae sessile native
Crisiella producta Crisiidae sessile native
Cristaphyes arctous Pycnophyidae benthic native
Crossaster papposus Rose seastar Solasteridae benthic 3.4 native
Cryptobranchia alba White blind limpet Lepetidae benthic native
Cryptobranchia concentrica Ringed blind limpet Lepetidae benthic native
Cryptocope abbreviata Pseudotanaidae benthic native
Cryptocopoides arcticus Cryptocopidae benthic native
Cryptonatica affinis Arctic moonsnail Naticidae benthic 3.0 DL native
Cryptonatica bathybii Naticidae benthic 1.2 DL native
Cryptonatica russa Naticidae benthic native
Cryptopora gnomon Cryptoporidae benthic 0.6 TL native
Ctenodiscus crispatus Cookie-cutter seastar Goniopectinidae benthic native
Cuapetes americanus American grass shrimp Palaemonidae benthic native
Cucumaria calcigera Cucumariidae benthic native
Cucumaria frondosa Orange-footed sea cucumber Cucumariidae benthic 50.0 TL 2.0 native
Cucumaria georgiana Cucumariidae benthic native
Cumella carinata Nannastacidae benthic native
Curtitoma conoidea Conidae benthic 1.0 DL native
Curtitoma decussata Decussate turrid Conidae benthic native
Curtitoma incisula Incised Northern turrid Conidae benthic 1.1 DL native
Curtitoma novajasemljensis Conidae benthic 1.1 DL native
Curtitoma trevelliana Conidae benthic native
Curtitoma violacea Conidae benthic 0.9 DL native
Cuspidaria arctica Cuspidariidae benthic 2.0 DL native
Cuspidaria centobi Cuspidariidae benthic endemic
Cuspidaria glacialis Glacial dipperclam Cuspidariidae benthic native
Cuspidaria rostrata Rostrate dipperclam Cuspidariidae benthic native
Cuspidaria subtorta Cuspidariidae benthic 0.7 DL native
Cuspidaria turgida Cuspidariidae benthic native
Cuspidella humilis Incertae sedis (Leptothecata) sessile native
Cuspidella procumbens Incertae sedis (Leptothecata) sessile native
Cuthona concinna Neat aeolid Cuthonidae benthic 1.5 TL native
Cuthona gymnota Orange-tip Cuthona Cuthonidae benthic 2.3 TL native
Cuthona nana Cuthonidae benthic 1.0 DL native
Cuthona viridis Viridis aeolid Cuthonidae benthic 1.1 TL 4.0 native
Cyanea capillata Lion's mane Cyaneidae pelagic 3.6 native
Cyanea tzetlinii Cyaneidae benthopelagic native
Cyclocardia borealis Northern Cyclocardia Carditidae benthic native
Cyclocaris guilelmi Lysianassidae pelagic native
Cyclopecten hoskynsi Propeamussiidae benthic native
Cyclopecten imbrifer Shingle glass-scallop Propeamussiidae benthic 1.2 DL native
Cyclopina gracilis Cyclopinidae pelagic native
Cyclopina schneideri Cyclopinidae benthic native
Cylichna alba White Cylichna Cylichnidae benthic 0.7 TL native
Cylichna cylindracea Cylichnidae benthic native
Cylichna gouldii Gould chalice-bubble Cylichnidae benthic 0.8 DL native
Cylichna lemchei Cylichnidae benthic native
Cylichna magna Cylichnidae demersal 1.3 DL native
Cylichna nucleolus Kernel chalice-bubble Cylichnidae benthic native
Cylichnoides occultus Concealed chalice-bubble Cylichnidae benthic 0.5 DL native
Cylichnoides scalptus Cylichnidae benthic native
Cylindrostoma fingalianum Cylindrostomidae benthic native
Cyphocaris challengeri Cyphocarididae pelagic native
Cyprideis sorbyana Cytherideidae benthic native
Cyrtodaria kurriana Kurr propellerclam Hiatellidae benthic native
Cyrtodaria siliqua Northern propellerclam Hiatellidae benthic 11.0 SHL 2.0 native
Cystisella saccata Bryocryptellidae sessile native
Cystophora cristata Hooded seal Phocidae bathydemersal 260.0 TL 4.1 native
Cytheridea papillosa Cytherideidae benthic native
Cytheropteron punctatum Cytheruridae benthic native
Dacrydium pacificum Pacific glassy-mussel Mytilidae benthic native
Dacrydium vitreum Arctic glassy-mussel Mytilidae benthic native
Danielssenia quadriseta Pseudotachidiidae benthic native
Danielssenia typica Pseudotachidiidae benthic native
Defrancia lucernaria Corymboporidae sessile native
Delavalia arctica Miraciidae benthic native
Delavalia longicaudata Miraciidae benthic native
Delectopecten vitreus Vitreous scallop Pectinidae reef-associated 2.0 SHH 2.0 native
Delphinapterus leucas Beluga Monodontidae pelagic 550.0 TL 4.3 native
Delphinus delphis Common dolphin Delphinidae pelagic-oceanic 260.0 TL 4.5 native
Dendrobeania levinseni Bugulidae sessile native
Dendrodoa aggregata Styelidae sessile native
Dendrodoa grossularia Baked-bean ascidian Styelidae sessile 2.0 H native
Dendrodoa lineata Styelidae sessile native
Dendrodoa pulchella Styelidae sessile native
Dendronotus arcticus Dendronotidae benthic native
Dendronotus dalli Dall's Dendronotus Dendronotidae benthic 13.6 TL native
Dendronotus elegans Dendronotidae benthic 4.4 native
Dendronotus frondosus Frond-aeolis Dendronotidae benthic 3.0 TL native
Dendronotus nordenskioeldi Dendronotidae benthic native
Dendronotus robustus Robust frond-aeolis Dendronotidae benthic 2.9 DL native
Dendronotus yrjargul Dendronotidae benthic native
Dentalina mutabilis Nodosariidae benthic native
Deontostoma arcticum Leptosomatidae benthic native
Dermatobranchus walteri Arminidae demersal 1.7 DL native
Derogenes varicus Hemiuridae host native
Desmophyllum dianthus Cockscomb cup coral Caryophylliidae reef-associated native
Desmosoma lineare Desmosomatidae benthic native
Desmote vorax Umagillidae benthic native
Desulfofaba gelida Desulfobacteraceae others native
Dexiospira spirillum Serpulidae sessile native
Diamphiodia craterodmeta Amphiuridae benthic native
Diaphana globosa Diaphanidae demersal 0.4 DL native
Diaphana hiemalis Diaphanidae benthic 0.7 DL native
Diaphana makarovi Diaphanidae benthic native
Diaphana minuta Arctic paperbubble Diaphanidae benthic 0.5 DL native
Diascorhynchus borealis Diascorhynchidae benthic native
Diastylis bidentata Diastylidae benthic native
Diastylis dalli Diastylidae demersal native
Diastylis echinata Diastylidae benthic native
Diastylis edwardsi Diastylidae benthic native
Diastylis glabra Diastylidae demersal native
Diastylis goodsiri Diastylidae benthic native
Diastylis lepechini Diastylidae benthic native
Diastylis lucifera Diastylidae benthic native
Diastylis oxyrhyncha Diastylidae benthic native
Diastylis polaris Diastylidae benthic native
Diastylis rathkei Diastylidae benthic 0.9 TL native
Diastylis scorpioides Diastylidae benthic native
Diastylis spinulosa Diastylidae benthic native
Diastylis sulcata Diastylidae benthic native
Diaulula sandiegensis Ringed doris Discodorididae benthic 8.0 TL 3.0 native
Didemnum albidum Northern white crust Didemnidae sessile native
Dimophyes arctica Diphyidae pelagic native
Diodora aspera Keyhole limpet Fissurellidae benthic 7.5 TL 2.7 native
Diphyllobothrium phocarum Diphyllobothriidae host native
Diplocirrus glaucus Flabelligeridae benthic 2.0 native
Diplocirrus hirsutus Flabelligeridae benthic native
Diplocirrus longisetosus Flabelligeridae benthic native
Diplodonta aleutica Aleutian diplodon Ungulinidae benthic native
Diplodonta torelli Ungulinidae benthic native
Diplosolen intricarius Plagioeciidae sessile native
Diplosolen obelium Plagioeciidae sessile native
Dipolydora caulleryi Spionidae benthic 2.0 native
Dipolydora coeca Spionidae benthic native
Dipolydora quadrilobata Spionidae benthic native
Discias atlanticus Disciadidae benthic native
Discias serratirostris Disciadidae benthic native
Discias vernbergi Disciadidae benthic native
Disco triangularis Discoidae benthic native
Discoconchoecia elegans Halocyprididae pelagic native
Disconectes furcatus Munnopsidae benthic native
Disconectes phalangium Munnopsidae benthic native
Discurria insessa Kelp limpet Lottiidae benthic 2.0 NG 2.0 native
Distaplia clavata Holozoidae sessile native
Dolichomacrostomum uniporum Dolichomacrostomidae benthic native
Doridoxa ingolfiana Doridoxidae demersal 1.2 DL native
Doris montereyensis Monterey sea-lemon Dorididae benthic 15.0 TL 3.0 native
Dorvillea pseudorubrovittata Dorvilleidae benthic native
Doryporella spathulifera Calloporidae sessile native
Drepanopus bungei Clausocalanidae pelagic native
Drifa glomerata Dense carnation coral Alcyoniidae sessile native
Drilonereis caulleryi Oenonidae benthic native
Drilonereis magna Threadworm Oenonidae benthic native
Dryodora glandiformis Dryodoridae pelagic native
Dulichia falcata Podoceridae benthic native
Dulichiopsis abyssi Podoceridae benthic native
Duplorbis calathurae Duplorbidae host native
Dyopedos monacanthus Podoceridae benthic native
Dyopedos porrectus Podoceridae benthic native
Dyopedos spinosus Podoceridae benthic native
Dysidea fragilis Brittle horny sponge Dysideidae sessile native
Dysponetus pygmaeus Chrysopetalidae benthic native
Echinarachnius parma Purple sand dollar Echinarachniidae benthic native
Echinoclathria beringensis Microcionidae sessile native
Echinoderes angustus Echinoderidae benthic native
Echinoderes aquilonius Echinoderidae benthic native
Echinoderes arlis Echinoderidae benthic 0.0 TRKL native
Echinoderes balerioni Echinoderidae benthic native
Echinoderes daenerysae Echinoderidae benthic native
Echinoderes drogoni Echinoderidae benthic native
Echinoderes eximus Echinoderidae benthic native
Echinoderes peterseni Echinoderidae benthic native
Echinoderes rhaegali Echinoderidae benthic native
Echinoderes stockmani Echinoderidae benthic native
Echinoderes svetlanae Echinoderidae benthic native
Echinoderes tubilak Echinoderidae benthic native
Echinorhynchus gadi Echinorhynchidae host native
Echiurus echiurus Spoon (innkeeper) worm Echiuridae benthic native
Edwardsia andresi Andre's sea anemone Edwardsiidae sessile native
Edwardsia arctica Edwardsiidae sessile native
Edwardsiella carnea Edwardsiidae benthic native
Eiconaxius albatrossae Axiidae benthic native
Ekmania barthii Phyllophoridae benthic native
Ektonodiastylis nimia Diastylidae benthic native
Ektonos turbonilloides Cerithiopsidae demersal 2.5 DL native
Eledone cirrhosa Horned octopus Eledonidae benthic 55.0 TL 3.7 native
Elphidium bartletti Elphidiidae benthic native
Elpidia belyaevi Elpidiidae benthic native
Elpidia glacialis Elpidiidae benthic native
Elpidia heckeri Elpidiidae benthic native
Emplectonema neesii Emplectonematidae benthic native
Enipo canadensis Polynoidae benthic native
Enipo chuckchi Polynoidae benthic native
Enipo gracilis Polynoidae benthic native
Enipo torelli Polynoidae benthic native
Ennucula corticata Veneridae benthic 0.4 DL native
Ennucula romboides Veneridae benthic endemic
Ennucula tenuis Smooth nutclam Veneridae benthic 1.0 DL native
Entalophora clavata Entalophoridae sessile native
Entalophoroecia deflexa Entalophoridae sessile native
Entocolax ludwigii Eulimidae demersal native
Ephesiella abyssorum Sphaerodoridae benthic native
Ephesiella minuta Sphaerodoridae benthic native
Ephyrina benedicti Oplophoridae pelagic native
Ephyrina bifida Split deep-sea shrimp Oplophoridae pelagic native
Ephyrina figueirai Contour deep-sea shrimp Oplophoridae pelagic native
Ephyrina ombango Ombango deep-sea shrimp Oplophoridae pelagic native
Epiactis arctica Arctic brooding anemone Actiniidae sessile native
Epigamia alexandri Syllidae benthic native
Epilabidocera amphitrites Pontellidae pelagic native
Epimeria loricata Epimeriidae benthic native
Epizoanthus erdmanni Epizoanthidae benthic native
Epizoanthus incrustatus Epizoanthidae sessile native
Epizoanthus lindahli Lindahl's zoanthid Epizoanthidae sessile native
Erginus rubellus Reddish limpet Lottiidae benthic 0.8 DL native
Ericthonius megalops Ischyroceridae benthic native
Ericthonius punctatus Ischyroceridae benthic 2.0 native
Ericthonius tolli Ischyroceridae benthic native
Erignathus barbatus Bearded seal Phocidae bathydemersal 250.0 TL 4.5 native
Erinaceusyllis erinaceus Syllidae benthic native
Eriopisa elongata Melitidae benthic native
Erythrops abyssorum Mysidae benthic native
Erythrops erythrophthalmus Mysidae pelagic native
Erythrops glacialis Mysidae benthic native
Escharella dijmphnae Escharellidae sessile native
Escharella macrodonta Escharellidae sessile native
Escharella ventricosa Escharellidae sessile native
Escharoides bidenkapi Exochellidae sessile native
Escharoides jacksoni Exochellidae sessile native
Escharopsis rosacea Umbonulidae sessile native
Escharopsis sarsi Umbonulidae sessile native
Eschrichtius robustus Gray whale Eschrichtiidae pelagic 1,500.0 TL 3.3 native
Esperiopsis villosa Esperiopsidae sessile native
Eteone flava Phyllodocidae benthic native
Eteone longa Phyllodocidae benthic native
Eteone spetsbergensis Phyllodocidae benthic native
Eualus belcheri Hippolytidae benthic native
Eualus fabricii Arctic eualid Hippolytidae benthic native
Eualus gaimardii Circumpolar eualid Hippolytidae benthic 2.6 native
Eualus macilentus Greenland shrimp Hippolytidae benthic native
Eualus macropthalmus Bigeye eulid Hippolytidae benthic native
Eualus suckleyi Shortscale eualid Hippolytidae benthic native
Euaugaptilus hyperboreus Augaptilidae pelagic native
Eubalaena glacialis North Atlantic right whale Balaenidae pelagic 1,800.0 TL 3.2 native
Eubalaena japonica North Pacific right whale Balaenidae pelagic native
Eubranchus exiguus Dwarf balloon aeolis Eubranchidae benthic 0.4 DL native
Eubranchus tricolor Painted balloon aeolis Eubranchidae benthic native
Eucalanus bungii Eucalanidae benthic native
Euchone analis Sabellidae benthic native
Euchone elegans Sabellidae benthic native
Euchone papillosa Sabellidae benthic native
Eucranta villosa Polynoidae benthic native
Eucratea loricata Feathery bryozoan Scrupariidae sessile native
Eudendrium arbuscula Eudendriidae sessile native
Eudendrium capillare Slender stickhydroid Eudendriidae sessile native
Eudendrium rameum Eudendriidae sessile native
Eudendrium ramosum Stickyhydroid Eudendriidae sessile native
Eudendrium vaginatum Annulate sticky hydroid Eudendriidae sessile native
Eudorella emarginata Leuconidae benthic 2.0 native
Eudorella groenlandica Leuconidae demersal native
Eudorella hispida Leuconidae benthic native
Eudorella intermedia Leuconidae demersal native
Eudorella minor Leuconidae demersal native
Eudorella parvula Leuconidae benthic native
Eudorella spitzbergensis Leuconidae benthic native
Eudorella truncatula Leuconidae benthic 2.0 native
Eudorellopsis biplicata Leuconidae benthic native
Eudorellopsis deformis Leuconidae benthic 2.0 native
Eudorellopsis derzhavini Leuconidae demersal native
Eudorellopsis integra Leuconidae benthic native
Eudorellopsis leuconi Leuconidae demersal native
Eudorellopsis uschakovi Leuconidae demersal native
Eugerda tenuimana Desmosomatidae benthic native
Eugerdella armata Desmosomatidae benthic native
Eugerdella coarctata Desmosomatidae benthic native
Eugerdella hessleri Desmosomatidae benthic native
Eugyra glutinans Molgulidae sessile native
Eukrohnia hamata Eukrohniidae pelagic-oceanic 4.3 BL native
Eulalia bilineata Phyllodocidae benthic native
Eulalia viridis Greenleaf worm Phyllodocidae benthic 3.2 native
Eulima bilineata Eulimidae benthic native
Eumedusa birulai Bythotiaridae pelagic 1.0 WD native
Eumetopias jubatus Steller's sea lion Otariidae bathydemersal 330.0 TL 4.3 native
Eumida minuta Phyllodocidae benthic native
Eunephthya rubiformis Nephtheidae sessile native
Eunereis longissima Nereididae benthic 50.0 TL native
Eunice norvegica Eunicidae benthic native
Eunice pennata Eunicidae benthic native
Eunoe clarki Polynoidae benthic native
Eunoe depressa Depressed scale worm Polynoidae benthic native
Eunoe nodosa Giant scale worm Polynoidae benthic native
Eunoe oerstedi Multi-pronged scaleworm Polynoidae benthic native
Eunoe senta Thorny scaleworm Polynoidae benthic native
Euphrosine borealis Euphrosinidae benthic native
Euphrosine cirrata Euphrosinidae benthic native
Euphysa aurata Euphysidae pelagic 0.4 H native
Euphysa flammea Euphysidae pelagic-neritic 0.7 WD native
Euphysa tentaculata Euphysidae pelagic-neritic 0.6 H native
Euplokamis crinita Euplokamididae pelagic native
Eupyrgus scaber Molpadiidae benthic native
Eurycletodes echinatus Argestidae benthic native
Eurycletodes latus Argestidae benthic native
Eurycletodes serratus Argestidae benthic native
Eurycletodes similis Argestidae benthic native
Eurycope brevirostris Eurycopidae bathydemersal native
Eurycope cornuta Eurycopidae bathydemersal native
Eurycope cryoabyssalis Eurycopidae bathydemersal native
Eurycope hanseni Eurycopidae bathydemersal native
Eurycope inermis Eurycopidae bathydemersal native
Eurycope mutica Eurycopidae benthic native
Eurycope producta Eurycopidae benthic native
Eurycope pygmaea Eurycopidae benthic native
Eurycope ratmanovi Eurycopidae benthic native
Eurycyde hispida Ammotheidae benthic native
Eurynorhynchus pygmeus Scolopacidae others native
Eurystheus melanops Isaeidae benthic native
Eurytemora herdmani Temoridae benthic native
Eurytemora pacifica Temoridae pelagic native
Eurytemora richingsi Temoridae benthic native
Eurythenes gryllus Lysianassidae benthic 7.5 TL native
Eusergestes arcticus Sergestidae bathypelagic 1.4 CL 3.2 native
Eusirus cuspidatus Eusiridae benthic native
Eusirus holmi Eusiridae benthic native
Eusirus leptocarpus Eusiridae benthic native
Euspira pallida Pale moonsnail Naticidae benthic 4.2 DL native
Euspira tenuistriata Naticidae demersal 1.9 DL native
Eusyllis blomstrandi Syllidae benthic native
Eutonina indicans Aggregating jelly Campanulinidae pelagic 3.5 WD native
Evadne nordmanni Polyphemidae pelagic native
Evasterias echinosoma Asteriidae benthic native
Exogone dispar Syllidae benthic native
Exogone naidina Syllidae benthic native
Exogone verugera Syllidae benthic native
Fabricia sabella Sabellidae benthic native
Falcidens afanasjevi Chaetodermatidae benthic native
Falcidens moskalevi Chaetodermatidae benthic native
Falcidens thorensis Chaetodermatidae benthic native
Fasciculiporoides americana Frondiporidae benthic native
Filellum serpens Lafoeidae sessile introduced
Filicrisia smitti Crisiidae sessile native
Finmarchinella finmarchica Hemicytheridae benthic native
Fissidentalium candidum Dentaliidae benthic native
Fissidentalium capillosum Dentaliidae benthic native
Fissurina annectens Ellipsolagenidae benthic native
Flabelligena cirrata Acrocirridae benthic native
Flabelligera affinis Flabby bristle-worm Flabelligeridae benthic native
Flabelligera bophortica Flabelligeridae benthic native
Flabelligera mastigophora Flabelligeridae benthic native
Flabellina borealis Flabellinidae demersal 5.5 DL native
Flabellina gracilis Flabellinidae benthic 1.5 DL native
Flabellina nobilis Nobilis aeolis Flabellinidae benthic 6.3 DL native
Flabellina salmonacea Salmon aeolis Flabellinidae benthic 7.5 TL 4.0 native
Flabellina verrucosa Red-finger aeolis Flabellinidae benthic 6.0 TL 4.0 native
Flaccisagitta enflata Sagittidae pelagic 2.5 BL 2.8 native
Flustra serrulata Flustridae sessile native
Forcepia fabricans Coelosphaeridae sessile native
Forcepia topsenti Coelosphaeridae sessile native
Foviella affinis Procerodidae benthic native
Fratercula arctica Atlantic puffin Alcidae others 30.0 TL 4.3 native
Fratercula cirrhata Tufted puffin Alcidae others 4.3 native
Fratercula corniculata Horned puffin Alcidae pelagic 41.0 TL 4.2 native
Frigidoalvania cruenta Rissoidae benthic native
Frigidoalvania janmayeni Jan mayen alvania Rissoidae benthic 0.6 DL native
Fritillaria borealis Fritillariidae pelagic-neritic native
Fulmarus glacialis Northern fulmar Procellariidae others 51.0 TL 3.8 native
Fultonia sarsi Argestidae benthic native
Funchalia villosa Penaeidae bathypelagic 3.9 native
Fusceulima projectilabrum Eulimidae demersal 0.2 DL native
Gaetanus brevispinus Aetideidae pelagic native
Gaetanus tenuispinus Aetideidae pelagic native
Gaetanus variabilis Aetideidae benthic native
Galathealinum arcticum Siboglinidae benthic native
Galathowenia fragilis Oweniidae sessile native
Galathowenia oculata Oweniidae benthic native
Gammaracanthus loricatus Gammaracanthidae benthic native
Gammarellus homari Gammarellidae benthic native
Gammaropsis maculata Photidae benthic 2.7 native
Gammarus oceanicus Gammaridae benthic 2.0 native
Gammarus setosus Gammaridae benthic native
Gammarus wilkitzkii Gammaridae pelagic 6.2 BL 2.3 native
Gattyana amondseni Polynoidae benthic native
Gattyana ciliata Ciliated scale worm Polynoidae benthic native
Gattyana cirrhosa Polynoidae benthic 2.0 native
Gavia adamsii White-billed diver Gaviidae others 3.4 native
Gavia immer Great Northern diver Gaviidae others 4.5 native
Gavia pacifica Pacific Arctic loon Gaviidae others native
Gavia stellata Red-throated diver Gaviidae others native
Genetyllis castanea Phyllodocidae benthic native
Gennadas bouvieri Benthesicymidae bathypelagic 3.6 native
Gennadas brevirostris Benthesicymidae pelagic native
Gennadas capensis Benthesicymidae bathypelagic 3.8 native
Gennadas scutatus Benthesicymidae pelagic 3.7 native
Gennadas talismani Benthesicymidae pelagic native
Gennadas valens Valuable blunt-tail prawn Benthesicymidae pelagic 3.8 native
Geodia barretti Barrett's horny sponge Geodiidae sessile native
Geodia macandrewii Geodiidae sessile native
Gephyrothuria alcocki Gephyrothuriidae benthic native
Gersemia fruticosa Arctic soft coral Nephtheidae sessile native
Gersemia rubiformis Sea strawberry Nephtheidae sessile native
Gibbula cineraria Grey topshell Trochidae benthic 1.8 SHL native
Gitanopsis arctica Amphilochidae benthic native
Gitanopsis inermis Amphilochidae benthic native
Glaciarcula spitzbergensis Dallinidae benthic native
Globicephala melas Long-finned pilot whale Delphinidae pelagic 670.0 TL 4.5 native
Glycera capitata Glyceridae benthic 15.0 TL native
Glycinde wireni Goniadidae benthic native
Glyphanostomum pallescens Ampharetidae benthic native
Gnathia albescens Gnathiidae reef-associated native
Gnathia arctica Gnathiidae reef-associated native
Gnathia dentata Gnathiidae benthic native
Gnathia elongata Gnathiidae benthic native
Gnathia maxillaris Gnathiidae host native
Gnathia oxyuraea Gnathiidae host native
Gnathia stygia Gnathiidae benthic native
Gnathophylloides mineri Squat urchin shrimp Palaemonidae benthic native
Gnathophyllum americanum Bumblebee shrimp Palaemonidae reef-associated native
Gnathophyllum circellum Circled shrimp Palaemonidae benthic native
Gnathophyllum modestum Spotted bumblebee shrimp Palaemonidae benthic native
Gnathorhynchus conocaudatus Gnathorhynchidae benthic native
Gnathostomula murmanica Gnathostomulidae benthic native
Goesia depressa Aoridae benthic native
Golfingia margaritacea Peanut worm Golfingiidae benthic 2.0 native
Golfingia margaritacea Peanut worm Golfingiidae benthic native
Golfingia muricaudata Golfingiidae benthic native
Golfingia vulgaris Brown peanut worm Golfingiidae benthic 0.4 TRKL native
Gonatus fabricii Boreoatlantic gonate squid Gonatidae pelagic 38.5 ML 3.7 native
Gonatus steenstrupi Atlantic gonate squid Gonatidae pelagic 15.0 ML native
Goniada brunnea Goniadidae benthic native
Gonothyraea loveni Campanulariidae sessile native
Gorgonocephalus arcticus Northern basket star Gorgonocephalidae benthic native
Gorgonocephalus eucnemis Common basket star Gorgonocephalidae benthic native
Gracilimesus angustus Ischnomesidae benthic 0.5 BL native
Gracilimesus tenuispinis Ischnomesidae benthic native
Graffiellus croceus Polycystididae benthic native
Graffiellus groenlandicus Polycystididae benthic native
Graffilla buccinicola Graffillidae host native
Graffilla graffi Graffillidae host native
Grammaria abietina Lafoeidae sessile 10.0 OT native
Grammaria borealis Lafoeidae pelagic native
Grammaria immersa Lafoeidae sessile native
Grandicrepidula grandis Great slippersnail Calyptraeidae demersal native
Graneledone verrucosa Warty octopus Octopodidae benthic 50.0 TL native
Grateloupia doryphora Dasyaceae sessile native
Gregariella coarctata Cancellate mussel Mytilidae benthic native
Grimalditeuthis bonplandii Grimaldi's chiroteuthid squid Chiroteuthidae bathypelagic 25.0 ML 3.8 native
Grimpoteuthis wuelkeri Wülker's flapjack octopod Opisthoteuthidae benthic 40.0 TL native
Grubianella klugei Ampharetidae benthic native
Guernea nordenskioldi Dexaminidae benthic native
Gyrodactylus kutikovana Gyrodactylidae host native
Gyrodactylus marinus Gyrodactylidae host native
Hadropenaeus affinis Solenoceridae benthic native
Hadropenaeus modestus Solenoceridae benthic native
Haemobaphes cyclopterina Roe-bandit gill worm Pennellidae host native
Halammovortex macropharynx Dalyelliidae benthic native
Halammovortex nigrifrons Dalyelliidae benthic native
Halcampa arctica Arctic sea anemone Halcampidae sessile native
Halecium beanii Thornbush hydroid Haleciidae sessile native
Halecium curvicaule Haleciidae sessile native
Halecium groenlandicum Haleciidae sessile native
Halecium labrosum Haleciidae sessile native
Halecium minutum Haleciidae sessile native
Halecium muricatum Sea hedgehog hydroid Haleciidae sessile native
Halecium scutum Haleciidae sessile native
Halecium speciosum Haleciidae sessile native
Halecium tenellum Haleciidae sessile native
Halecium undulatum Haleciidae sessile native
Halectinosoma clavatum Ectinosomatidae benthic native
Halectinosoma curticorne Ectinosomatidae benthic native
Halectinosoma elongatum Ectinosomatidae benthic native
Halectinosoma finmarchicum Ectinosomatidae benthic native
Halectinosoma gothiceps Ectinosomatidae benthic native
Halectinosoma neglectum Ectinosomatidae benthic native
Halectinosoma proximum Ectinosomatidae benthic native
Halectinosoma sarsii Ectinosomatidae benthic native
Haliaeetus albicilla White-tailed sea eagle Accipitridae others 4.6 native
Halice abyssi Pardaliscidae benthic native
Halichoerus grypus Grey seal Phocidae bathydemersal 230.0 TL 4.5 native
Halichondria colossea Halichondriidae sessile native
Halichondria lambei Conic horny sponge Halichondriidae sessile native
Halichondria oblonga Halichondriidae sessile native
Halichondria panicea Bread-crumb sponge Halichondriidae sessile native
Halichondria sitiens Green-tinged sponge Halichondriidae sessile native
Haliclona fibulata Chalinidae sessile native
Haliclona gracilis Slender horny sponge Chalinidae sessile native
Haliclona oculata Eyed finger sponge Chalinidae sessile native
Haliclona porosa Chalinidae sessile native
Haliclona rufescens Red horny sponge Chalinidae sessile native
Haliclona urceolus Small pitcher horny sponge Chalinidae sessile native
Haliclona vladimirkoltuni Chalinidae sessile native
Haliclystus octoradiatus Haliclystidae benthopelagic native
Halicnemia wagini Heteroxyidae sessile native
Halicreas minimum Halicreatidae pelagic native
Halicryptus higginsi Priapulidae benthic 39.0 TL native
Halicryptus spinulosus Priapulidae benthic 3.0 TL 3.0 native
Haliella stenostoma Eulimidae demersal 0.9 DL native
Haliphron atlanticus Gelatinous giant octopod Alloposidae benthopelagic 69.0 ML 3.9 native
Halirages caecus Calliopiidae benthic native
Halirages elegans Calliopiidae benthic native
Halirages fulvocincta Calliopiidae benthic native
Halirages fulvocinctus Calliopiidae benthic native
Halirages gorbunovi Calliopiidae benthic native
Halirages maculatus Calliopiidae benthic native
Halirages mixtus Calliopiidae benthic native
Halirages nilssoni Calliopiidae benthic native
Halirages quadridentatus Calliopiidae benthic native
Halirages qvadridentatus Calliopiidae benthic native
Halirages stappersi Calliopiidae benthic native
Haliragoides inermis Calliopiidae benthic native
Halitholus cirratus Pandeidae pelagic 1.4 WD native
Halitholus pauper Pandeidae pelagic 0.9 WD native
Halitholus yoldiaearcticae Pandeidae pelagic native
Halocynthia aurantium Pacific sea peach Pyuridae sessile 15.0 H native
Halocynthia pyriformis Sea peach Pyuridae sessile 13.0 TL native
Haloptilus acutifrons Augaptilidae pelagic native
Haloptilus pseudooxycephalus Augaptilidae benthic native
Haloschizopera clotensis Miraciidae benthic native
Hamingia arctica Bonelliidae benthic native
Haminoea solitaria Solitary glassy-bubble Haminoeidae benthic 1.8 DL native
Hanleya hanleyi Eastern hanleya Hanleyidae benthic 0.7 DL native
Hanleyella asiatica Leptochitonidae benthic native
Haplomesus modestus Ischnomesidae benthic native
Haplomesus quadrispinosus Ischnomesidae benthic native
Haploniscus bicuspis Haploniscidae benthic native
Haploniscus ingolfi Haploniscidae benthic native
Haploops laevis Ampeliscidae benthic native
Haploops setosa Ampeliscidae benthic native
Haploops sibirica Ampeliscidae benthic native
Haploops tubicola Ampeliscidae benthic native
Haploposthia brunea Haploposthiidae demersal native
Haploposthia rubra Haploposthiidae demersal native
Harmothoe beringiana Polynoidae benthic native
Harmothoe extenuata Yellow and brown scaleworm Polynoidae benthic native
Harmothoe fragilis Polynoidae benthic native
Harmothoe glabra Polynoidae benthic native
Harmothoe imbricata Fifteen-scaled worm Polynoidae benthic 3.3 native
Harmothoe impar Polynoidae benthic native
Harmothoe multisetosa Polynoidae benthic native
Harmothoe nodosa Polynoidae benthopelagic native
Harmothoe oerstedi Polynoidae benthic native
Harmothoe rarispina Polynoidae benthic native
Harpacticus superflexus Harpacticidae benthic native
Harpacticus uniremis Harpacticidae benthic native
Harpinia antennaria Phoxocephalidae benthic 2.7 native
Harpinia crenulata Phoxocephalidae benthic 2.8 native
Harpinia mucronata Phoxocephalidae benthic native
Harpinia plumosa Phoxocephalidae benthic native
Harpinia propinqua Phoxocephalidae benthic native
Harpinia serrata Phoxocephalidae benthic native
Harpiniopsis amundseni Phoxocephalidae benthic native
Harpiniopsis similis Phoxocephalidae benthic native
Harrimania kupfferi Harrimaniidae demersal native
Hartlaubella gelatinosa Campanulariidae sessile native
Hartmania moorei Polynoidae benthic native
Hartmeyeria arctica Pyuridae sessile native
Hathrometra tenella Antedonidae benthic native
Haynesina orbicularis Nonionidae benthic native
Helicocranchia pfefferi Pfeffer's cranch squid Cranchiidae pelagic-oceanic 10.0 ML native
Heliometra glacialis Antedonidae sessile native
Hemiaclis ventrosa Eulimidae demersal 0.4 DL native
Hemiarthrus abdominalis Bopyridae benthic native
Hemicythere concinna Hemicytheridae benthic native
Hemilamprops cristatus Lampropidae benthic native
Hemilamprops uniplicata Lampropidae benthic native
Hemilamprops uniplicatus Lampropidae demersal native
Hemimycale rhodus Hymedesmiidae sessile native
Hemipenaeus carpenteri Aristeidae benthic native
Hemithiris psittacea Hemithyrididae benthic native
Hemiurus levinseni Hemiuridae host native
Henricia eschrichti Echinasteridae benthic native
Henricia perforata Echinasteridae benthic native
Henricia pertusa Echinasteridae benthic native
Henricia sanguinolenta Blood sea star Echinasteridae benthic 3.2 native
Henricia tumida Fat Henricia Echinasteridae benthic native
Hepomadus tener Delicate gamba prawn Aristeidae benthic native
Heptacyclus scorpii Piscicolidae benthic native
Heptacyclus virgatus Piscicolidae benthic native
Hermaea dendritica Spanish tenor Stiligeridae benthic 0.1 TL native
Hermissenda crassicornis Hermissenda Facelinidae benthic 7.0 TL 3.6 native
Heteromastus filiformis Capitellidae benthic 10.0 TL 2.0 native
Heteropsyllus exiguus Canthocamptidae benthic native
Heteropsyllus major Canthocamptidae benthic native
Heteropsyllus rostratus Canthocamptidae benthic native
Heterorhabdus norvegicus Heterorhabdidae pelagic native
Heteroschismoides subterfissus Entalinidae benthic 0.9 DL native
Heterotanais oerstedii Leptocheliidae benthic native
Hiatella arctica Arctic hiatella Hiatellidae benthic 5.0 SHL native
Hippasteria phrygiana Trojan star Goniasteridae benthic native
Hippomedon abyssi Lysianassidae benthic native
Hippomedon propinquus Lysianassidae benthic native
Hippomonavella borealis Schizoporellidae sessile native
Hippoporina reticulatopunctata Bitectiporidae sessile native
Hippothoa hyalina Hippothoidae sessile native
Histioteuthis meleagroteuthis Pearly jewel squid Histioteuthidae pelagic-oceanic 11.4 ML native
Histrionicus histrionicus Harlequin duck Anatidae others 46.0 TL 3.6 native
Histriophoca fasciata Ribbon seal Phocidae bathydemersal 180.0 TL 4.1 native
Holanthus expergitus Hemiasteridae benthic native
Homoeonema platygonon Rhopalonematidae pelagic native
Hormathia digitata Maned sea anemone Hormathiidae sessile native
Hormathia nodosa Rugose anemone Hormathiidae sessile native
Hormosina globulifera Hormosinidae benthic native
Hormosina normani Hormosinidae pelagic native
Hyalinoecia tubicola Quill worm Onuphidae benthic native
Hyalopomatus claparedii Serpulidae benthic native
Hyalopontius typicus Megapontiidae pelagic native
Hyas alutaceus Oregoniidae benthic native
Hyas araneus Atlantic lyre crab Oregoniidae benthic native
Hyas coarctatus Arctic lyre crab Oregoniidae benthic 3.6 native
Hybocodon prolifer Tubulariidae pelagic 0.3 WD native
Hydractinia carica Hydractiniidae sessile native
Hydractinia laevispina Hydractiniidae pelagic native
Hydrobia minuta Hydrobiidae benthic native
Hymedesmia dermata Hymedesmiidae sessile native
Hymedesmia irregularis Hymedesmiidae sessile native
Hymedesmia longurius Hymedesmiidae sessile native
Hymedesmia nummulus Hymedesmiidae sessile native
Hymedesmia occulta Hymedesmiidae sessile native
Hymedesmia peachii Hymedesmiidae sessile native
Hymedesmia platychela Hymedesmiidae sessile native
Hymenaster pellucidus Pterasteridae benthic native
Hymeniacidon assimilis Halichondriidae sessile native
Hymeniacidon perlevis Halichondriidae sessile native
Hymenodora frontalis Pacific ambereye Acanthephyridae pelagic native
Hymenodora glacialis Northern ambereye Acanthephyridae benthopelagic native
Hymenopenaeus aphoticus Solenoceridae benthic native
Hymenopenaeus debilis Solenoceridae benthic native
Hymenopenaeus laevis Solenoceridae benthic native
Hyperammina cylindrica Hippocrepinidae benthic native
Hyperammina elongata Hippocrepinidae benthic native
Hyperia galba Hyperiidae host native
Hyperia spinigera Hyperiidae benthic native
Hyperoche medusarum Hyperiidae pelagic native
Hyperoodon ampullatus North Atlantic bottlenose whale Ziphiidae pelagic 980.0 TL 4.5 native
Icasterias panopla Asteriidae benthic native
Ichnopus spinicornis Lysianassidae benthic native
Idanthyrsus armatus Sabellariidae sessile native
Idmidronea atlantica Tubuliporidae sessile native
Idmoneoides simplex Tubuliporidae sessile native
Idunella aequicornis Liljeborgiidae benthic native
Illex illecebrosus Northern shortfin squid Ommastrephidae pelagic 31.0 ML 4.1 native
Ilyarachna frami Munnopsidae benthic native
Ilyarachna hirticeps Munnopsidae benthic native
Ilyarachna longicornis Munnopsidae benthic native
Iophon dubium Acarnidae sessile native
Iophon piceum Pitch-black horny sponge Acarnidae sessile native
Iothia fulva Lepetidae demersal native
Iphinoe coronata Bodotriidae benthic native
Ischyrocerus anguipes Ischyroceridae benthic 0.8 BL native
Ischyrocerus brusilovi Ischyroceridae benthic native
Ischyrocerus commensalis Ischyroceridae benthic native
Ischyrocerus latipes Ischyroceridae benthic native
Ischyrocerus megacheir Ischyroceridae benthic native
Ischyrocerus megalops Ischyroceridae benthic native
Ischyrocerus nanoides Ischyroceridae benthic native
Isocirrus planiceps Maldanidae benthic native
Isodictya palmata Common palmate sponge Isodictyidae sessile native
Isodictya quatsinoensis Isodictyidae sessile native
Isozoanthus bulbosus Bulbous zoanthid Parazoanthidae sessile native
Itaipusa scotica Koinocystididae benthic native
Itaspiella helgolandica Otoplanidae benthic native
Janicella spinicauda Oplophoridae bathypelagic 4.0 native
Janira alta Janiridae benthic native
Janira maculosa Janiridae benthic native
Janirella erostrata Janirellidae benthic native
Jaschnovia brevis Aetideidae pelagic native
Jaschnovia tolli Aetideidae benthic native
Jasmineira schaudinni Sabellidae benthic native
Jensenia angulata Dalyelliidae benthic native
Katadesmia kolthoffi Malletiidae benthic endemic
Katianira bilobata Katianiridae benthic native
Keenocardium californiense Aleutian cockle Cardiidae benthic 7.5 SHH native
Kelliola symmetros Lasaeidae benthic native
Keratosum maximum Incertae sedis (Leptothecata) pelagic native
Kinetoskias arborescens Bugulidae sessile native
Kinetoskias mitsukurii Bugulidae sessile native
Kinetoskias smitti Bugulidae sessile native
Kolga hyalina Elpidiidae benthic native
Korethraster hispidus Korethrasteridae benthic native
Krakenella galtsovae Pycnophyidae benthic native
Krohnia hamata Phyllodocidae pelagic native
Kukenthalia borealis Styelidae sessile native
Kuma viridis Haploposthiidae demersal native
Labidochirus splendescens Splendid hermit Paguridae benthic native
Labrospira crassimargo Haplophragmoididae benthic native
Lacuna crassior Thick lacuna Littorinidae demersal 1.2 DL native
Lacuna pallidula Pale lacuna Littorinidae benthic 1.0 DL native
Lacuna vincta Northern lacuna Littorinidae benthic 1.3 DL 2.0 native
Laeocochlis sinistrata Cerithiopsidae demersal native
Laetmatophilus armatus Podoceridae benthic native
Laetmonice filicornis Aphroditidae benthic native
Laevicardium pristis Cardiidae benthic 3.9 DL native
Laevidentalina baggi Nodosariidae benthic native
Lafoea benthophila Lafoeidae pelagic native
Lafoea dumosa Robust tree hydroid Lafoeidae sessile native
Lafoea fruticosa Lafoeidae sessile native
Lafoea gracillima Lafoeidae sessile Native
Lafoea grandis Lafoeidae sessile native
Lafoeina maxima Campanulinidae sessile 15.0 H native
Lagena striata Lagenidae benthic native
Lagenammina difflugiformis Saccamminidae reef-associated native
Lagenorhynchus albirostris White-beaked dolphin Delphinidae pelagic 320.0 TL 4.5 native
Lamprops carinata Lampropidae demersal native
Lamprops fasciata Lampropidae demersal native
Lamprops fasciatus Lampropidae benthic native
Lamprops fuscata Lampropidae benthic native
Lamprops korroensis Lampropidae benthic native
Lamprops quadriplicata Lampropidae demersal native
Lamprops sarsi Lampropidae demersal native
Lanassa nordenskioldi Terebellidae benthic native
Lanassa venusta Terebellidae benthic native
Lanceola clausi Lanceolidae benthic native
Laona finmarchica Finmark paperbubble Philinidae benthic 0.9 DL native
Laona quadrata Quadrate paperbubble Philinidae benthic 0.6 TL native
Laonice bahusiensis Spionidae benthic native
Laonice blakei Spionidae benthic native
Laonice cirrata Spionidae benthic 2.0 native
Laonome kroyeri Sabellidae benthic native
Laophontodes typicus Ancorabolidae benthic native
Laphania boecki Terebellidae benthic native
Larsenia scalaroides Vanikoridae demersal 0.2 DL native
Larus argentatus Herring gull Laridae others 66.0 TL 4.4 native
Larus armenicus Armenian gull Laridae others 4.6 native
Larus canus Common gull Laridae others 46.0 TL 4.3 native
Larus fuscus Lesser black-backed gull Laridae others 61.0 TL 4.2 native
Larus hyperboreus Glaucous gull Laridae others 77.0 TL 4.3 native
Larus thayeri Laridae others 4.5 native
Latisipho hypolispus Buccinidae benthic native
Latrunculia tricincta Latrunculiidae sessile native
Latrunculia triloba Latrunculiidae sessile native
Laubiericoncha myriamae Vesicomyidae benthic native
Leaena ebranchiata Terebellidae benthic native
Leander paulensis Red-algae shrimp Palaemonidae benthic native
Leander tenuicornis Brown grass shrimp Palaemonidae benthic native
Lebbeus groenlandicus Spiny lebbeid Thoridae benthic native
Lebbeus microceros Thoridae benthic native
Lebbeus polaris Polar lebbeid Thoridae benthic 3.0 native
Lecithaster gibbosus Hemiuridae host native
Leitoscoloplos mammosus Orbiniidae benthic native
Leitoscoloplos pugettensis Orbiniidae demersal native
Lembos arcticus Aoridae benthic native
Lepechinella arctica Lepechinellidae benthic native
Lepeta caeca Northern blind limpet Lepetidae benthic 1.8 DL native
Lepidapedon elongatum Lepocreadiidae host native
Lepidepecreum serratum Tryphosidae benthic native
Lepidepecreum umbo Tryphosidae benthic native
Leptanthura tenuis Leptanthuridae benthic native
Leptasterias arctica Arctic star Asteriidae benthic native
Leptasterias groenlandica Greenland star Asteriidae benthic native
Leptasterias polaris Polar six-rayed star Asteriidae benthic native
Leptasterias polaris Polar six-rayed star Asteriidae benthic 3.2 native
Leptochela bermudensis Bermuda comb shrimp Pasiphaeidae benthopelagic native
Leptochela carinata Carinate glass shrimp Pasiphaeidae benthopelagic native
Leptochela papulata Light glass shrimp Pasiphaeidae benthic native
Leptochela serratorbita Combclaw shrimp Pasiphaeidae benthic native
Leptognathia acanthifera Leptognathiidae pelagic native
Leptognathia amdrupi Leptognathiidae benthic native
Leptognathia armata Leptognathiidae pelagic native
Leptognathia glacialis Leptognathiidae benthic native
Leptognathia gracilis Leptognathiidae benthic native
Leptognathia inermis Leptognathiidae benthic native
Leptognathia longiremis Leptognathiidae benthic native
Leptognathia manca Leptognathiidae benthic native
Leptognathia ventralis Leptognathiidae benthic native
Leptostylis ampullacea Diastylidae benthic native
Leptostylis gorbunovi Diastylidae demersal native
Leptostylis gracilis Diastylidae demersal native
Leptostylis longimana Diastylidae benthic native
Leptostylis macrura Diastylidae benthic native
Leptostylis villosa Diastylidae benthic native
Leptychaster arcticus Arctic sand star Astropectinidae benthic native
Lethasterias nanimensis Black-spined sea star Asteriidae benthic native
Leucandra heathi Bristly case sponge Grantiidae sessile native
Leucilla nuttingi Stalked vase sponge Amphoriscidae sessile native
Leuckartiara nobilis Pandeidae pelagic 2.0 WD native
Leucon acutirostris Leuconidae benthic native
Leucon craterus Leuconidae demersal native
Leucon fulvus Leuconidae benthic native
Leucon kobjakovae Leuconidae demersal native
Leucon longirostris Leuconidae demersal native
Leucon minor Leuconidae demersal native
Leucon nasica Leuconidae benthic native
Leucon nasicoides Leuconidae benthic native
Leucon nathorsti Leuconidae benthic 0.5 BL native
Leucon pallidus Leuconidae benthic native
Leucon robustus Leuconidae demersal native
Leucon spinulosus Leuconidae benthic native
Leuconia alaskensis Baeriidae sessile native
Leuconia ananas Baeriidae sessile native
Leucopsila stilifera Baeriidae sessile native
Leucosolenia complicata Leucosoleniidae sessile native
Leviapseudes gracillimus Apseudidae benthic 1.5 BL native
Levinsenia gracilis Paraonidae benthic 2.0 native
Lichenopora crassiuscula Lichenoporidae sessile native
Liljeborgia fissicornis Liljeborgiidae benthic native
Limacina helicina Helicid pteropod Limacinidae pelagic 1.3 SHD native
Limacina retroversa Retrovert pteropod Limacinidae pelagic 0.3 DL 2.4 native
Limatula attenuata Attenuate fileclam Limidae benthic native
Limatula hyperborea Arctic fileclam Limidae benthic 1.4 DL native
Limatula japonica Japan fileclam Limidae benthic native
Limatula saturna Saturna fileclam Limidae benthic native
Limatula similaris Furrowless fileclam Limidae benthic native
Limatula subauriculata Small-ear fileclam Limidae benthic native
Limneria undata Wavy lamellaria Velutinidae benthic 2.7 DL native
Limnocalanus grimaldii Centropagidae pelagic native
Limnocalanus macrurus Centropagidae benthopelagic native
Limopsis minuta Minute limops Limopsidae benthic native
Lineus ruber Red ribbon worm Lineidae benthic native
Lineus viridis Lineidae benthic native
Liocyma fluctuosa Wavy liocyma Veneridae benthic native
Liostomia eburnea Pyramidellidae benthic 0.5 DL native
Lipkebe holthuisi Wellington shrimp Palaemonidae benthic native
Lissoclinum aureum Didemnidae sessile native
Lissodendoryx complicata Coelosphaeridae sessile native
Lissodendoryx fragilis Coelosphaeridae sessile native
Lissodendoryx indistincta Indefinite horny sponge Coelosphaeridae sessile native
Lissodendoryx lundbecki Coelosphaeridae sessile native
Lissodendoryx olgae Coelosphaeridae sessile native
Listea simplex Promesostomidae benthic native
Lithodes maja Norway king crab Lithodidae benthic native
Lithophaga aristata Scissor datemussel Mytilidae benthic 5.2 SHL native
Lithophaga attenuata Attenuated datemussel Mytilidae benthic native
Littorina fabalis Flat periwinkle Littorinidae benthic 1.5 DL native
Littorina littorea Common periwinkle Littorinidae benthic 4.2 DL 2.0 native
Littorina obtusata Yellow periwinkle Littorinidae benthic 1.3 DL native
Littorina saxatilis Rough periwinkle Littorinidae benthic 1.9 DL native
Littorina squalida Littorinidae benthic native
Lobatula lobatula Cibicididae benthic native
Loeblichopsis sabulosa Astrorhizidae benthic native
Lophaster furcifer Solasteridae benthic native
Lophaster verrilli Solasteridae benthic native
Lottia scutum Pacific plate limpet Lottiidae demersal native
Loxosomella antedonis Loxosomatidae benthic native
Lubbockia glacialis Lubbockiidae pelagic native
Lucernaria haeckeli Lucernariidae benthopelagic 2.7 WD native
Lucernaria quadricornis Lucernariidae benthopelagic 6.0 WD native
Lucicutia anomala Lucicutiidae benthic native
Lucicutia polaris Lucicutiidae benthic native
Lucicutia pseudopolaris Lucicutiidae benthic native
Lucifer faxoni Lucifer shrimp Luciferidae pelagic 2.0 native
Lucifer typus Luciferidae pelagic native
Lumbricillus arenarius Enchytraeidae benthic native
Lumbricillus lineatus Enchytraeidae benthic native
Lumbricillus tuba Enchytraeidae benthic native
Lumbriclymene minor Maldanidae sessile native
Lumbrineris acuta Lumbrineridae benthic native
Lumbrineris coccinea Lumbrineridae benthic native
Lumbrineris fragilis Lumbrineridae benthic native
Lumbrineris impatiens Lumbrineridae benthic native
Lumbrineris latreilli Lumbrineridae benthic native
Lumbrineris minuta Lumbrineridae benthic native
Lumbrineris mixochaeta Lumbrineridae benthic native
Lumbrineris tenuis Lumbrineridae benthic native
Lunatia monterona Naticidae benthic native
Lycopodina cupressiformis Cladorhizidae sessile native
Lycopodina infundibulum Cladorhizidae sessile native
Lycopodina lycopodium Cladorhizidae sessile native
Lycopodina minuta Cladorhizidae sessile native
Lycopodina robusta Cladorhizidae sessile native
Lycopodina ruijsi Cladorhizidae sessile native
Lyonsia arenosa Sandy lyonsia Lyonsiidae benthic native
Lyonsiella abyssicola Lyonsiellidae benthic native
Lysilla loveni Terebellidae benthic native
Lysippe labiata Ampharetidae sessile native
Macellicephala longipalpa Polynoidae benthic native
Macellicephala violacea Polynoidae benthic native
Macoma balthica Baltic macoma Tellinidae benthic 3.8 SHL native
Macoma brota Heavy macoma Tellinidae benthic 7.5 SHL native
Macoma calcarea Chalky macoma Tellinidae benthic 6.0 SHL native
Macoma crassula Thick macoma Tellinidae benthic native
Macoma lama Aleutian macoma Tellinidae benthic 4.5 SHL native
Macoma loveni Inflated macoma Tellinidae benthic native
Macoma moesta Flat macoma Tellinidae benthic 3.0 SHL native
Macoma torelli Triangular macoma Tellinidae benthic native
Macrobrachium acanthurus Cinnamon river shrimp Palaemonidae benthic native
Macrobrachium carcinus Bigclaw river shrimp Palaemonidae benthic native
Macrobrachium crenulatum Palaemonidae benthic native
Macrobrachium faustinum Palaemonidae benthic native
Macrobrachium heterochirus Cascade river prawn Palaemonidae benthic native
Macrobrachium ohione Ohio shrimp Palaemonidae benthic 11.0 TL native
Macrobrachium olfersii Bristled river shrimp Palaemonidae benthic native
Macrostomum curvituba Macrostomidae benthic native
Macrostylis spinifera Macrostylidae benthic native
Mactromeris polynyma Arctic surfclam Mactridae benthic 16.0 SHL native
Maehrenthalia agilis Byrsophlebidae benthic native
Makrokylindrus vitiasi Diastylidae benthic native
Malacoceros fuliginosus Spionidae benthic native
Malacopsyllus fragilis Ameiridae benthic native
Maldane arctica Maldanidae benthic native
Maldane glebifex Maldanidae sessile native
Maldane sarsi Bambooworm Maldanidae benthic 2.0 native
Malletia abyssopolaris Malletiidae benthic native
Marenzelleria viridis Spionidae benthic 2.0 native
Marenzelleria wireni Spionidae benthic native
Margarites argentatus Trochidae benthic 0.3 DL native
Margarites costalis Boreal rosy margarite Trochidae benthic 2.5 TL native
Margarites costalis Boreal rosy margarite Trochidae benthic 2.5 TL native
Margarites giganteus Giant margarite Trochidae benthic native
Margarites groenlandicus Greenland margarite Trochidae benthic 2.5 DL native
Margarites healyi Trochidae benthic native
Margarites helicinus Spiral margarite Trochidae benthic 1.1 DL native
Margarites olivaceus Olive margarite Trochidae benthic 1.1 DL native
Margarites pribiloffensis Trochidae benthic native
Margarites sordidus Trochidae benthic native
Margarites striatus Trochidae benthic native
Margarites umbilicalis Trochidae benthic native
Margarites vahlii Vahl margarite Trochidae benthic 0.5 DL native
Margarites vorticifer Vortex margarite Trochidae benthic native
Margelopsis hartlaubi Margelopsidae pelagic 0.4 WD native
Marsenina glabra Bald lamellaria Velutinidae demersal 1.8 DL native
Megalocranchia oceanica Oceanic cranch squid Cranchiidae pelagic-oceanic 81.0 ML native
Megaptera novaeangliae Humpback whale Balaenopteridae pelagic 1,889.8 TL 3.6 native
Megayoldia thraciaeformis Broad yoldia Yoldiidae benthic 6.5 TL native
Melaenis loveni Polynoidae benthic native
Melanitta fusca Velvet scoter Anatidae others 59.0 TL 3.3 native
Melanitta nigra Black scoter Anatidae others 3.9 native
Melanitta perspicillata Surf scoter Anatidae others 54.0 TL 3.5 native
Melicertum octocostatum Eight-strand jelly Melicertidae pelagic 1.4 WD 3.7 native
Melinna cristata Ampharetidae benthic 2.0 native
Melinna elisabethae Ampharetidae benthic native
Melinna palmata Ampharetidae sessile 2.0 native
Melinnopsis annenkovae Ampharetidae benthic native
Melinnopsis arctica Ampharetidae benthic native
Melita dentata Melitidae benthic native
Melita formosa Melitidae benthic native
Melita quadrispinosa Melitidae benthic native
Melphidippa goesi Melphidippidae benthic native
Mendicula ferruginosa Rusty axinopsid Thyasiridae benthic 0.2 DL native
Menestho albula Pyramidellidae demersal 0.9 DL native
Menestho truncatula Pyramidellidae benthic 0.4 DL native
Menigrates obtusifrons Lysianassidae benthic native
Meningodora compsa Oplophoridae pelagic native
Meningodora marptocheles Oplophoridae pelagic native
Meningodora mollis Oplophoridae pelagic native
Meningodora vesca Oplophoridae bathypelagic native
Mergus serrator Red-breasted merganser Anatidae others 4.5 native
Mertensia ovum Mertensiidae pelagic 5.5 H native
Mesocalanus tenuicornis Calanidae pelagic native
Mesocentrotus franciscanus Red Sea urchin Strongylocentrotidae benthic 19.0 WD 2.0 native
Mesocletodes monensis Argestidae benthic native
Mesopenaeus tropicalis Salmon shrimp Solenoceridae benthic native
Mesoplodon bidens Sowerby's beaked whale Ziphiidae pelagic 550.0 TL 4.5 native
Mesoplodon stejnegeri Stejneger's beaked whale Ziphiidae pelagic 530.0 TL native
Mesothuria cathedralis Synallactidae benthic native
Mesothuria intestinalis Synallactidae benthic native
Metacaprella horrida Caprellidae benthic native
Metapenaeopsis gerardoi Penaeidae benthic native
Metapenaeopsis goodei Caribbean velvet shrimp Penaeidae benthic 2.1 CL native
Metapenaeopsis smithi Penaeidae benthic native
Metavermilia arctica Serpulidae benthic native
Meterythrops robusta Mysidae benthic native
Metopa boeckii Stenothoidae benthic native
Metopa bruzelii Stenothoidae benthic native
Metopa glacialis Stenothoidae benthic native
Metopa groenlandica Stenothoidae benthic native
Metopa norvegica Stenothoidae benthic native
Metopa propinqua Stenothoidae benthic native
Metopa robusta Stenothoidae benthic native
Metopa sinuata Stenothoidae benthic native
Metopa spitzbergensis Stenothoidae benthic native
Metopella nasuta Stenothoidae benthic native
Metopelloides zernovi Stenothoidae benthic native
Metridia longa Metridinidae pelagic native
Metridia lucens Metridinidae pelagic-oceanic native
Metridia pacifica Metridinidae benthic native
Michthyops arcticus Mysidae benthic native
Michthyops theeli Mysidae benthic native
Microarthridion littorale Tachidiidae benthic native
Microcalanus pygmaeus Clausocalanidae pelagic native
Microciona lambei Microcionidae sessile native
Micronephthys minuta Nephtyidae benthic native
Microphthalmus aberrans Hesionidae benthic native
Microphthalmus sczelkowii Hesionidae benthic native
Microporina articulata Calpensiidae sessile native
Microprosthema semilaeve Crimson coral shrimp Spongicolidae benthic native
Microsetella norvegica Ectinosomatidae pelagic native
Microsetella rosea Ectinosomatidae pelagic 2.0 native
Microstomum jenseni Microstomidae benthic native
Microstomum septentrionale Microstomidae benthic native
Micrura alaskensis Lineidae benthic 60.0 TL native
Miliolinella subrotunda Roundish vermiculum Hauerinidae benthic native
Mimocalanus damkaeri Spinocalanidae benthic native
Minicheviella murmanica Minicheviellidae demersal native
Minona cornupenis Monocelididae benthic native
Mirabilicoxa gracilipes Desmosomatidae benthic native
Mitrocoma cellularia Cross jelly Mitrocomidae pelagic 9.0 WD native
Mitrocomella polydiademata Mitrocomidae pelagic 3.0 WD 4.0 native
Modiolus capax Fat horsemussel Mytilidae benthic native
Modiolus carpenteri California horsemussel Mytilidae benthic native
Modiolus modiolus Northern horsemussel Mytilidae benthic 18.0 TL native
Modiolus neglectus Neglected horsemussel Mytilidae benthic native
Modiolus rectus Straight horsemussel Mytilidae sessile 23.0 TL native
Modiolus sacculifer Bag horsemussel Mytilidae benthic native
Moelleria costulata Ribbed moelleria Turbinidae benthic 0.3 DL native
Mohnia corbis Buccinidae benthic native
Mohnia mohni Buccinidae benthic native
Molgula griffithsii Molgulidae sessile native
Molgula retortiformis Sea clod Molgulidae sessile 10.0 TL native
Molgula siphonalis Molgulidae sessile native
Molpadia arctica Molpadiidae benthic native
Molpadia oolitica Molpadiidae benthic native
Monobrachium parasitum Olindiidae pelagic native
Monocelis durhami Monocelididae benthic native
Monocelis fusca Monocelididae benthic native
Monocelis lineata Monocelididae benthic native
Monocoryne gigantea Candelabridae sessile native
Monoculodes borealis Oedicerotidae benthic native
Monoculodes latimanus Oedicerotidae benthic native
Monoculodes longirostris Oedicerotidae benthic native
Monoculodes packardi Oedicerotidae benthic native
Monoculodes simplex Oedicerotidae benthic native
Monoculodes tuberculatus Oedicerotidae benthic native
Monoculopsis longicornis Oedicerotidae benthic native
Monodon monoceros Narwhal Monodontidae pelagic 470.0 TL 4.5 native
Monostichoplana filum Otoplanidae benthic native
Montacuta dawsoni Lasaeidae benthic native
Montacuta spitzbergensis Lasaeidae benthic 0.8 SHL native
Munida intermedia Munididae benthic native
Munida tenuimana Munididae benthic 3.1 CL 2.0 native
Munida valida Munididae benthic native
Munidopsis curvirostra Munidopsidae benthic native
Munna acanthifera Munnidae benthic native
Munna boeckii Munnidae benthic native
Munna fabricii Munnidae benthic native
Munna kroyeri Munnidae benthic native
Munna limicola Munnidae benthic native
Munnopsis typica Munnopsidae benthic native
Munnopsurus giganteus Eurycopidae benthic native
Musculus corrugatus Mytilidae benthic native
Musculus discors Discordant mussel Mytilidae benthic 5.5 TL native
Musculus glacialis Corrugate mussel Mytilidae benthic native
Musculus marmoratus Spotted mussel Mytilidae benthic native
Musculus niger Black mussel Mytilidae benthic 5.8 DL native
Muusoctopus aegir Enteroctopodidae pelagic 5.2 ML native
Muusoctopus profundorum Enteroctopodidae benthic native
Muusoctopus sibiricus Enteroctopodidae benthic native
Mya pseudoarenaria False softshell Myidae benthic 5.2 TL native
Mya truncata Truncate softshell Myidae benthic 8.0 SHL native
Mycale arctica Mycalidae sessile native
Mycale helios Mycalidae sessile native
Mycale intermedia Mycalidae sessile native
Mycale lingua Furrowed horny sponge Mycalidae sessile native
Mycale loveni Loven's horny sponge Mycalidae sessile native
Myosotella myosotis Mouse-eared snail Ellobiidae benthic introduced
Myriochele heeri Oweniidae benthic native
Myriochele oculata Oweniidae benthic native
Myriochele olgae Oweniidae benthic native
Myrioglobula malmgreni Oweniidae benthic native
Myrionema amboinense Eudendriidae sessile native
Myriotrochus eurycyclus Myriotrochidae benthic native
Myriotrochus rinkii Myriotrochidae benthic native
Myriotrochus theeli Myriotrochidae benthic native
Myriozoella plana Myriozoidae sessile native
Mysella planata Flat mysella Lasaeidae benthic native
Mysella tumida Lasaeidae benthic native
Mysis litoralis Mysidae benthic native
Mysis nordenskioldi Mysidae pelagic-neritic native
Mysis oculata Mysidae pelagic native
Mysis relicta Mysidae benthopelagic 2.5 native
Mysta barbata Phyllodocidae benthic native
Mystides borealis Phyllodocidae benthic native
Mytilus edulis Blue mussel Mytilidae benthic 11.0 SHL 2.0 native
Mytilus galloprovincialis Mediterranean mussel Mytilidae benthic 16.5 SHL 2.7 introduced
Mytilus trossulus Foolish mussel Mytilidae benthic 9.0 TL native
Myxicola infundibulum Sabellid worm Sabellidae sessile 9.0 TL native
Myxidium bergense Myxidiidae host native
Myxilla barentsi Myxillidae sessile native
Myxilla brunnea Myxillidae sessile native
Myxilla incrustans Rough scallop sponge Myxillidae sessile 1.0 H native
Myxilla pedunculata Myxillidae sessile native
Nannoniscoides angulatus Nannoniscidae benthic native
Nannoniscus arcticus Nannoniscidae benthic native
Nannoniscus simplex Nannoniscidae benthic native
Nannopus palustris Nannopodidae benthic native
Nassarius incrassatus Thick lipped dog whelk Nassariidae demersal native
Nausithoe limpida Nausithoidae pelagic native
Nausithoe werneri Nausithoidae pelagic native
Neaeromya rugifera Wrinkled montacutid Lasaeidae benthic 5.0 SHL native
Nebalia bipes Nebalia shrimp Nebaliidae benthic native
Nematocarcinus cursor Nematocarcinidae benthic 3.2 native
Nematocarcinus ensifer Nematocarcinidae benthic 3.2 native
Nematocarcinus rotundus Nematocarcinidae benthic 3.3 native
Nemertoderma bathycola Nemertodermatidae demersal native
Nemidia tamarae Polynoidae benthic native
Neoamphitrite affinis Terebellidae sessile native
Neoamphitrite groenlandica Terebellidae benthic native
Neobirsteiniamysis inermis Mysidae benthopelagic native
Neocalanus cristatus Calanidae benthic native
Neocalanus flemingeri Calanidae benthic native
Neocalanus plumchrus Calanidae benthic native
Neocrangon communis Twospine crangon Crangonidae benthic native
Neognathorhynchus lobatus Gnathorhynchidae benthic native
Neognathorhynchus suecicus Gnathorhynchidae benthic native
Neohela maxima Unciolidae benthic native
Neohela monstrosa Unciolidae benthic native
Neoiphinoe arctica Capulidae benthic native
Neoiphinoe coronata Crowned hairysnail Capulidae demersal native
Neoiphinoe echinata Capulidae benthic native
Neoiphinoe kroeyeri Kroyer's hairysnail Capulidae benthic native
Neolithodes grimaldii Porcupine crab Lithodidae benthopelagic native
Neomormonilla minor Mormonillidae pelagic native
Neomysis awatschensis Mysidae pelagic native
Neopleustes pulchellus Pleustidae benthic native
Neopontonides beaufortensis Seawhip shrimp Palaemonidae benthic native
Neopontonides chacei Palaemonidae benthic native
Neoturris breviconis Blob-top jelly Pandeidae pelagic 4.5 H native
Nephasoma abyssorum Golfingiidae benthic native
Nephasoma capilleforme Golfingiidae benthic native
Nephasoma diaphanes Golfingiidae benthic native
Nephasoma eremita Golfingiidae benthic native
Nephasoma lilljeborgi Golfingiidae benthic 3.0 TL native
Nephasoma minutum Golfingiidae benthic 1.5 TRKL native
Nephrops norvegicus Norway lobster Nephropidae benthic 24.0 BL 3.7 native
Nephtys caeca Nephtyidae benthic native
Nephtys ciliata Nephtyidae benthic native
Nephtys discors Nephtyidae benthic native
Nephtys hombergii Nephtyidae benthic 20.0 TL 3.8 native
Nephtys incisa Nephtyidae benthic native
Nephtys longosetosa Nephtyidae benthic 3.8 native
Nephtys paradoxa Nephtyidae benthic native
Nephtys pente Nephtyidae benthic native
Nephtys rickettsi Nephtyidae benthic native
Nepotilla amoena Conidae benthic 0.8 DL native
Neptunea communis Buccinidae benthic 12.3 DL native
Neptunea denselirata Buccinidae benthic native
Neptunea despecta Rejected neptune Buccinidae benthic 11.0 DL native
Neptunea heros Northern neptune Buccinidae benthic native
Neptunea intersculpta Buccinidae benthic native
Neptunea ithia Buccinidae benthic native
Neptunea lyrata Lyre whelk Buccinidae benthic 16.5 SHH native
Neptunea middendorffiana Buccinidae benthic native
Neptunea ventricosa Fat whelk Buccinidae benthic native
Nereilinum squamosum Siboglinidae sessile native
Nereimyra aphroditoides Hesionidae benthic native
Nereimyra punctata Hesionidae benthic native
Nereis pelagica Nereididae benthic 20.3 TL 2.6 native
Nereis zonata Nereididae benthic native
Nesion arcticum Uteriporidae benthic native
Nicippe tumida Pardaliscidae benthic native
Nicolea zostericola Terebellidae benthic 5.0 TL native
Nicomache lumbricalis Maldanidae benthic Native
Nicomache minor Maldanidae benthic native
Nicomache quadrispinata Maldanidae benthic native
Nigmatullinus acanthitelsonis Nematocarcinidae benthic native
Nodulotrophon coronatus Crown trophon Muricidae benthic native
Normanicythere leioderma Trachyleberididae pelagic native
Notentera ivanovi Notenteridae host native
Nothria conchylega Onuphidae benthic 10.0 TL native
Nothria hyperborea Onuphidae benthic native
Notocaryoplana arctica Otoplanidae benthic native
Notomastus latericeus Bristleworms nei Capitellidae benthic 30.0 TL 2.0 native
Notoplana atomata Leptoplanidae benthic native
Notoplana kuekenthali Leptoplanidae benthic native
Notoplites normani Scrupocellariidae sessile native
Notoplites sibirica Scrupocellariidae sessile native
Notoplites smitti Scrupocellariidae sessile native
Notoproctus oculatus Maldanidae benthic native
Notostomum cyclostomum Piscicolidae benthic native
Notostomus distirus Oplophoridae benthic native
Notostomus elegans Elegant deep-sea shrimp Oplophoridae bathypelagic native
Notostomus gibbosus Oplophoridae bathypelagic 4.3 native
Notostomus robustus Robust deep-sea shrimp Oplophoridae pelagic native
Nototropis smitti Dexaminidae benthic native
Nucella lapillus Atlantic dogwinkle Muricidae benthic 4.0 DL 3.4 native
Nucula delphinodonta Dolphintooth nutclam Veneridae benthic 0.3 DL native
Nucula pusilla Veneridae benthic native
Nucula zophos Veneridae benthic endemic
Nuculana minuta Minute nutclam Nuculanidae benthic native
Nuculana pernula Northern nutclam Nuculanidae benthic 1.8 DL native
Nuculana radiata Nuculanidae benthic native
Nuculana tenuisulcata Thin nut clam Nuculanidae benthic native
Numenius borealis Scolopacidae others native
Numenius phaeopus Whimbrel Scolopacidae others 4.0 native
Nymphon brevirostre Nymphonidae benthic 4.4 native
Nymphon brevitarse Nymphonidae benthic native
Nymphon elegans Nymphonidae benthic native
Nymphon grossipes Nymphonidae benthic native
Nymphon hirtipes Nymphonidae benthic 4.1 native
Nymphon inerme Nymphonidae benthic native
Nymphon leptocheles Nymphonidae bathydemersal native
Nymphon longimanum Nymphonidae benthic native
Nymphon longitarse Nymphonidae benthic native
Nymphon macronyx Nymphonidae benthic native
Nymphon rubrum Nymphonidae benthic 4.4 native
Nymphon schimkewitschi Nymphonidae benthic native
Nymphon serratum Nymphonidae benthic native
Nymphon sluiteri Nymphonidae benthic native
Nymphon stromi Nymphonidae benthic native
Obelia geniculata Knotted thread hydroid Campanulariidae epiphytic native
Obelia longissima Campanulariidae sessile native
Obelia plicata Campanulariidae pelagic native
Obesotoma simplex Simple lora Conidae benthic native
Obesotoma tumida Turridae benthic 1.1 DL native
Obesotoma woodiana Conidae benthic native
Ocnus glacialis Cucumariidae benthic native
Ocythoe tuberculata Football octopod Ocythoidae pelagic 96.0 TL native
Odius carinatus Odiidae benthic native
Odontozona libertae Stenopodidae benthic native
Odostomia turrita Pyramidellidae benthic native
Oecidiobranchus nanseni Desmosomatidae benthic native
Oediceros borealis Oedicerotidae benthic native
Oenopota arctica Mangeliidae benthic native
Oenopota bicarinata Two-keel turrid Mangeliidae benthic native
Oenopota bicarinatus Mangeliidae benthic native
Oenopota cinerea Mangeliidae benthic native
Oenopota elegans Elegant turrid Mangeliidae benthic native
Oenopota harpa Harp turrid Mangeliidae benthic native
Oenopota novajasemljensis Mangeliidae benthic native
Oenopota obliqua Mangeliidae benthic 0.9 DL native
Oenopota pingelii Mangeliidae benthic native
Oenopota pyramidalis Mangeliidae benthic native
Oenopota reticulata Reticulate turrid Mangeliidae benthic native
Oenopota reticulatus Mangeliidae benthic native
Oenopota simplex Mangeliidae benthic native
Oenopota turricula Turriculate turrid Mangeliidae benthic native
Oikopleura labradoriensis Oikopleuridae pelagic native
Oikopleura vanhoeffeni Oikopleuridae pelagic native
Oithona atlantica Oithonidae pelagic native
Oithona similis Oithonidae pelagic native
Okenia quadricornis Seasquirt okenia Goniodorididae benthic native
Omalogyra atomus Atom snail Omalogyridae benthic 0.1 DL native
Ommastrephes bartramii Neon flying squid Ommastrephidae benthopelagic 90.0 ML 4.4 native
Oncaea minuta Oncaeidae pelagic native
Oncaea notopus Oncaeidae pelagic native
Onchidiopsis brevipes Spherical blob snail Velutinidae benthic native
Onchidiopsis carnea Velutinidae demersal 2.8 DL native
Onchidiopsis glacialis Icy lamellaria Velutinidae benthic 1.8 DL native
Onchidoris bilamellata Barnacle-eating onchidoris Onchidorididae benthic 3.8 TL native
Onchidoris muricata Fuzzy onchidoris Onchidorididae benthic 1.4 TL native
Onchocalanus cristogerens Phaennidae benthic native
Oncousoecia canadensis Oncousoeciidae sessile native
Ondina divisa Pyramidellidae benthic native
Oneppus denticulatus Placorhynchidae benthic native
Onisimus affinis Uristidae benthic native
Onisimus brevicaudatus Uristidae benthic native
Onisimus caricus Uristidae benthic native
Onisimus edwardsi Uristidae benthic native
Onisimus glacialis Uristidae benthic 2.0 native
Onisimus litoralis Uristidae benthic native
Onisimus plautus Uristidae pelagic native
Onoba aculeus Pointed cingula Rissoidae benthic 0.4 DL native
Onoba improcera Rissoidae benthic native
Onoba leptalea Rissoidae demersal 0.3 DL native
Onoba mighelsii Rissoidae demersal 0.3 DL native
Onoba obliqua Rissoidae demersal 0.4 DL native
Onoba torelli Rissoidae demersal 0.3 DL native
Onuphis holobranchiata Onuphidae benthic native
Onuphis quadricuspis Onuphidae benthic 2.0 native
Onychoteuthis banksii Hooked squid Onychoteuthidae pelagic 37.0 ML 3.8 native
Oolina globosa Ellipsolagenidae benthic native
Opercularella lacerata Campanulinidae sessile native
Ophelia borealis Opheliidae benthic native
Ophelia limacina Opheliidae benthic 5.5 TL native
Ophelina abranchiata Opheliidae benthic 6.0 TL native
Ophelina acuminata Opheliidae benthic 6.0 TL 2.0 native
Ophelina aulogaster Opheliidae demersal native
Ophelina breviata Opheliidae benthic native
Ophelina cylindricaudata Opheliidae benthic native
Ophelina opisthobranchiata Opheliidae benthic native
Ophiacantha bidentata Ophiacanthidae benthic native
Ophiocten sericeum Ophiuridae benthic native
Ophiomusium lymani Ophiuridae benthic native
Ophiopholis aculeata Daisy brittle star Ophiactidae benthic native
Ophiopleura borealis Ophiuridae benthic native
Ophiopus arcticus Amphilepididae benthic native
Ophioscolex glacialis Ophiomyxidae benthic native
Ophiostriatus striatus Ophioleucidae benthic native
Ophiura maculata Ophiuridae benthic native
Ophiura robusta Ophiuridae benthic native
Ophiura sarsii Notched brittle star Ophiuridae benthic native
Ophiura signata Ophiuridae benthic native
Opisa eschrichti Opisidae benthic native
Opisthoteuthis borealis Opisthoteuthidae benthic 7.5 ML native
Oplophorus gracilirostris Oplophoridae bathypelagic 3.8 native
Oplophorus grimaldii Oplophoridae pelagic native
Oplophorus spinosus Oplophoridae pelagic 3.6 native
Oractis bursifera Haloclavidae sessile native
Oractis diomedeae Haloclavidae sessile native
Orbinia kupferi Orbiniidae benthic native
Orbinia norvegica Orbiniidae demersal native
Orchomene groenlandica Lysianassidae benthic native
Orchomene macroserrata Lysianassidae benthic native
Orchomene pectinata Lysianassidae benthic native
Orchomene pinquis Lysianassidae benthic native
Orchomene serratus Lysianassidae benthic native
Orchomenella minuta Lysianassidae benthic native
Orchomenella pinguis Lysianassidae benthic native
Orcinus orca Killer whale Delphinidae pelagic 980.0 TL 4.5 native
Oropallene polaris Callipallenidae benthic native
Orthopyxis integra Campanulariidae sessile native
Otocelis rubropunctata Otocelididae demersal native
Owenia borealis Oweniidae benthic native
Owenia fusiformis Tubeworm Oweniidae benthic 10.0 TL 2.0 native
Owenia polaris Oweniidae benthic native
Pagophila eburnea Ivory gull Laridae others 46.0 TL 4.2 native
Pagophilus groenlandicus Harp seal Phocidae bathydemersal 190.0 TL 3.6 native
Pagurus capillatus "dirty harry" Paguridae benthic native
Pagurus pubescens Paguridae benthic native
Pagurus rathbuni Longfinger hermit Paguridae benthic native
Pagurus trigonocheirus Fuzzy hermit Paguridae benthic native
Palaemon northropi Crossbanded grass shrimp Palaemonidae benthic native
Palaemonetes intermedius Brackish grass shrimp Palaemonidae benthic 2.2 native
Palaemonetes pugio Daggerblade grass shrimp Palaemonidae benthic 4.7 TL 2.7 native
Palaemonetes vulgaris Marsh grass shrimp Palaemonidae benthic 2.8 native
Palio dubia Dubious dorid Polyceridae benthic 1.2 TL native
Palio nothus Polyceridae benthic native
Pallenopsis calcanea Phoxichilidiidae bathypelagic native
Pallenopsis longiseta Phoxichilidiidae benthic native
Palmicellaria skenei Smittinidae sessile native
Pandalopsis ampla Deepwater bigeye Pandalidae benthic 17.0 TL native
Pandalopsis dispar Sidestriped shrimp Pandalidae benthopelagic native
Pandalus borealis Northern shrimp Pandalidae benthopelagic 16.5 TL 3.1 native
Pandalus goniurus Humpy shrimp Pandalidae benthic 14.2 TL 3.2 native
Pandalus montagui Aesop shrimp Pandalidae benthic 16.0 TL native
Pandora glacialis Glacial pandora Pandoridae benthic native
Pandora wardiana Giant pandora Pandoridae benthic 5.5 SHL native
Panomya norvegica Arctic roughmya Hiatellidae benthic 11.0 SHL native
Pantachogon haeckeli Rhopalonematidae pelagic native
Paracalanus parvus Paracalanidae pelagic native
Paracicerina laboeica Cicerinidae benthic native
Paradanielssenia christineae Pseudotachidiidae benthic native
Paradanielssenia triseta Pseudotachidiidae benthic native
Paradiopatra quadricuspis Onuphidae benthic native
Paradoneis lyra Paraonidae demersal native
Paradulichia typica Podoceridae benthic native
Paraedwardsia arenaria Edwardsiidae sessile native
Paraeuchaeta barbata Euchaetidae pelagic native
Paraeuchaeta glacialis Euchaetidae pelagic native
Paraeuchaeta norvegica Euchaetidae pelagic native
Paraeuchaeta polaris Euchaetidae pelagic native
Parafissurina tectulostoma Ellipsolagenidae benthic native
Paragotoea bathybia Corymorphidae pelagic 0.3 WD native
Parahalosydna krassini Polynoidae benthic native
Paraheterorhabdus compactus Heterorhabdidae benthic native
Paraleptostylis arctica Diastylidae demersal native
Paralibrotus setosus Lysianassidae benthic native
Paralithodes brevipes Brown king crab Lithodidae benthic 15.7 CW 2.0 native
Paralithodes camtschaticus Red king crab Lithodidae benthic 22.0 CL 3.7 native
Paralithodes platypus Blue king crab Lithodidae benthic 22.0 CW 3.8 native
Parameiropsis amphitriteae Ameiridae benthic native
Paramphinome jeffreysii Amphinomidae benthic native
Paramphinome pulchella Amphinomidae benthic native
Paramphithoe hystrix Epimeriidae benthic native
Paramphithoe polyacantha Epimeriidae benthic native
Paramunnopsis justi Munnopsidae benthic native
Paranaitis wahlbergi Phyllodocidae benthic native
Paranannopus echinipes Pseudotachidiidae benthic native
Paranemertes peregrina Mud nemertean Emplectonematidae benthic 40.0 TL native
Paraninoe minuta Lumbrineridae benthic native
Paraonides nordica Paraonidae benthic native
Paraonis fulgens Paraonidae benthic native
Parapasiphae compta Pasiphaeidae pelagic native
Parapasiphae cristata Pasiphaeidae pelagic native
Parapasiphae macrodactyla Pasiphaeidae pelagic 7.1 TL native
Parapasiphae sulcatifrons Grooveback shrimp Pasiphaeidae bathypelagic native
Parapenaeus americanus Penaeidae benthic native
Parapenaeus politus Rose shrimp Penaeidae benthic native
Paraphoxus oculatus Phoxocephalidae benthic native
Parapleustes assimilis Pleustidae benthic native
Parapleustes bicuspis Pleustidae benthic native
Parapleustes monocuspis Pleustidae benthic native
Paraproporus elegans Childiidae demersal native
Parasagitta elegans Sagittidae pelagic 3.0 BL 3.1 native
Paraschizorhynchoides glandulis Schizorhynchidae benthic native
Parasergestes armatus Sergestidae pelagic 3.3 native
Parasmittina jeffreysi Smittinidae sessile native
Parasmittina trispinosa Smittinidae sessile native
Parastichopus tremulus Stichopodidae benthic native
Parathyasira dunbari Thyasiridae benthic 0.8 DL native
Parathyasira equalis Equal cleftclam Thyasiridae benthic 0.6 DL 2.0 native
Paratomella unichaeta Paratomellidae benthic native
Paratryphosites abyssi Lysianassidae benthic native
Pardalisca abyssi Pardaliscidae benthic native
Pardalisca cuspidata Pardaliscidae benthic native
Pardalisca tenuipes Pardaliscidae benthic native
Pardaliscella malygini Pardaliscidae benthic native
Parerythrops spectabilis Mysidae demersal native
Paroediceros intermedius Oedicerotidae benthic native
Paroediceros lynceus Oedicerotidae benthic native
Paroediceros macrocheir Oedicerotidae benthic native
Paroediceros propinquus Oedicerotidae benthic native
Paronesimus barentsi Lysianassidae benthic native
Parougia caeca Dorvilleidae benthic native
Parvipalpina verrucosa Caprellidae benthic native
Pasiphaea merriami Ghost comb shrimp Pasiphaeidae pelagic native
Pasiphaea multidentata Pink glass shrimp Pasiphaeidae bathypelagic 10.5 TL 3.7 native
Pasiphaea tarda Crimson pasiphaeid Pasiphaeidae pelagic 5.5 CL native
Patella pellucida Blue-rayed limpet Patellidae demersal native
Pavlovskeola bicostata Nannastacidae demersal native
Pectinaria californiensis Pectinariidae benthic native
Pectinaria granulata Tusk coneworm Pectinariidae benthic native
Pedicellaster typicus Asteriidae benthic native
Pelagobia longicirrata Lopadorrhynchidae pelagic native
Pellina sitiens Halichondriidae sessile native
Pelonaia corrugata Styelidae sessile 14.0 TL native
Pelosina variabilis Astrorhizidae benthic native
Penaeopsis serrata Megalops shrimp Penaeidae benthic 14.0 TL native
Pentacoelum fucoideum Bdellouridae host native
Pentamera calcigera Phyllophoridae benthic native
Peraclistus oophagus Monocelididae host native
Pericladium mirabilis Sertulariidae sessile native
Periclimenaeus ascidiarum Caribbean ascidian shrimp Palaemonidae benthic native
Periclimenaeus atlanticus Palaemonidae benthic native
Periclimenaeus bermudensis Bermuda sponge shrimp Palaemonidae benthic native
Periclimenaeus bredini Palaemonidae benthic native
Periclimenaeus caraibicus Palaemonidae benthic native
Periclimenaeus chacei Palaemonidae benthic native
Periclimenaeus maxillulidens Palaemonidae benthic native
Periclimenaeus pearsei Black sponge shrimp Palaemonidae benthic native
Periclimenaeus perlatus Palaemonidae benthic native
Periclimenaeus schmitti Tortugas bigclaw Palaemonidae benthic native
Periclimenaeus wilsoni Clear sponge shrimp Palaemonidae benthic native
Periclimenes harringtoni Bermuda shrimp Palaemonidae benthic native
Periclimenes iridescens Iridescent shrimp Palaemonidae benthic native
Peringia ulvae Laver spire shell Hydrobiidae benthic native
Periphylla periphylla Merchant-cap Periphyllidae pelagic 3.3 native
Periploma aleuticum Aleutian spoonclam Periplomatidae benthic native
Petalidium suspiriosum Sergestidae pelagic native
Petaloproctus borealis Maldanidae benthic native
Petaloproctus tenuis Maldanidae demersal native
Petalosarsia declivis Pseudocumatidae benthic native
Phakellia ventilabrum Axinellidae sessile native
Phalacrocorax aristotelis European shag Phalacrocoracidae others 72.0 TL 4.3 native
Phalacrocorax carbo Great cormorant Phalacrocoracidae others 101.0 TL 4.4 native
Phalacrocorax pelagicus Pelagic cormorant Phalacrocoracidae others 68.0 TL 4.2 native
Phalacrophorus pictus Iospilidae pelagic native
Phalaropus fulicarius Red phalarope Scolopacidae others 3.5 native
Phalaropus lobatus Red-necked phalarope Scolopacidae others 3.4 native
Phascolion strombus Golfingiidae bathydemersal native
Phelliactis robusta Robust sea anemone Hormathiidae sessile native
Pherusa plumosa Flabelligeridae benthic 5.0 TL native
Phidolopora elongata Reteporidae sessile native
Philine denticulata Philinidae demersal native
Philine lima File paperbubble Philinidae benthic native
Philine polaris Axial paperbubble Philinidae benthic native
Philomedes brenda Philomedidae benthic native
Philomedes globosus Philomedidae benthic native
Phippsiella similis Stegocephalidae benthic native
Phoca largha Larga seal Phocidae bathydemersal 170.0 TL 4.0 native
Phoca vitulina Harbour seal Phocidae bathydemersal 190.0 TL 4.5 native
Phocoena phocoena Harbour porpoise Phocoenidae pelagic 200.0 TL 4.5 native
Phocoenoides dalli Dall's porpoise Phocoenidae pelagic 240.0 TL 4.5 native
Pholoe assimilis Pholoidae benthic native
Pholoe longa Pholoidae benthic native
Pholoe minuta Pholoidae benthic 2.0 native
Phonorhynchus helgolandicus Polycystididae benthic native
Phorbas claviger Hymedesmiidae sessile native
Phormosoma placenta Echinothuriidae benthic native
Photis reinhardi Photidae benthic native
Photis tenuicornis Photidae benthic 2.0 native
Phoxocephalus holbolli Phoxocephalidae benthic 2.0 native
Phylactella labiata Escharellidae sessile native
Phyllochaetopterus bhaudi Chaetopteridae benthic native
Phyllodoce citrina Phyllodocidae benthic native
Phyllodoce groenlandica Phyllodocidae benthic native
Phyllodoce maculata Phyllodocidae benthic native
Phyllodoce mucosa Phyllodocidae benthic native
Physeter macrocephalus Sperm whale Physeteridae pelagic 2,400.0 TL 4.5 native
Pikea californica Dumontiaceae sessile native
Piliscus commodus Widemouth lamellaria Velutinidae benthic 2.2 DL native
Pionosyllis compacta Syllidae benthic native
Pista cristata Terebellidae benthic 2.0 native
Pista maculata Fiber tube worm Terebellidae benthic 7.5 H native
Placorhynchus echinulatus Placorhynchidae benthic native
Placorhynchus octaculeatus Placorhynchidae benthic native
Plagiorhynchus crassicollis Plagiorhynchidae host native
Plagiostomum vittatum Plagiostomidae benthic native
Planispirinoides bucculentus Miliolidae benthic native
Platybdella fabricii Piscicolidae benthic native
Plehnia arctica Plehniidae demersal native
Pleurobrachia pileus Sea gooseberry Pleurobrachiidae pelagic 2.5 H 4.0 native
Pleurogonium inerme Paramunnidae benthic native
Pleurogonium spinosissimum Paramunnidae benthic native
Pleuronea fenestrata Tubuliporidae sessile native
Pleuroprion murdochi Arcturidae benthic native
Pleustes medius Pleustidae benthic native
Pleustes panoplus Pleustidae benthic native
Pleusymtes glabroides Pleustidae benthic native
Pleusymtes pulchella Pleustidae benthic native
Plicifusus kroyeri Arctic whelk Neptuneidae benthic native
Plocamionida ambigua Hymedesmiidae sessile native
Plotocnide borealis Tubulariidae pelagic 0.3 H native
Pluvialis dominica Lesser golden-plover Charadriidae others native
Pluvialis squatarola Grey plover Charadriidae others 28.0 TL 3.6 native
Podiceps auritus Horned grebe Podicipedidae others 3.2 native
Podocotyle atomon Opecoelidae host native
Podocotyle reflexa Opecoelidae host native
Podon leuckartii Podonidae pelagic native
Pogaina suecica Provorticidae benthic native
Polarsternium rugellosum Siboglinidae sessile native
Policordia jeffreysi Lyonsiellidae benthic native
Policordia uschakovi Lyonsiellidae benthic endemic
Poliometra prolixa Antedonidae sessile native
Polycarpa fibrosa Styelidae sessile 3.5 WD native
Polycirrus arcticus Terebellidae sessile native
Polycirrus fedorovi Terebellidae benthic native
Polycirrus medusa Terebellidae benthic native
Polycope orbicularis Polycopidae benthic native
Polydora aggregata Spionidae benthic native
Polydora socialis Spionidae benthic native
Polymastia andrica Many-knotted horny sponge Polymastiidae sessile native
Polymastia hemisphaerica Polymastiidae sessile native
Polymastia mamillaris Teat sponge Polymastiidae sessile native
Polymastia rara Polymastiidae sessile native
Polymastia thielei Polymastiidae sessile native
Polymastia uberrima Polymastiidae sessile native
Polynoe canadensis Polynoidae benthic native
Polynoe gracilis Polynoidae benthic native
Polyorchis penicillatus Penicillate jellyfish Polyorchidae pelagic 10.0 TL native
Polyphysia baffinensis Scalibregmatidae benthic native
Polyphysia crassa Scalibregmatidae demersal native
Polysiphonia stricta Pitcher siphon weed Rhodomelaceae epiphytic native
Polysticta stelleri Steller's eider Anatidae others 3.5 native
Pontaster tenuispinus Benthopectinidae benthic native
Pontocrates arcticus Oedicerotidae benthic native
Pontogeneia inermis Eusiridae benthopelagic native
Pontophilus norvegicus Norwegian shrimp Crangonidae benthic native
Pontoporeia affinis Pontoporeiidae benthic native
Pontoporeia femorata Pontoporeiidae benthic 2.0 native
Porania pulvillus Red cushion starfish Poraniidae benthic native
Poraniomorpha bidens Poraniidae benthic native
Poraniomorpha tumida Poraniidae benthic native
Porella aperta Bryocryptellidae sessile native
Porella plana Bryocryptellidae sessile native
Porella sacata Bryocryptellidae sessile native
Porella smitti Bryocryptellidae sessile native
Porrocystis assimilis Polycystididae benthic native
Portlandia aestuariorum Estuary yoldia Yoldiidae benthic native
Portlandia arctica Arctic yoldia Yoldiidae benthic native
Portlandia intermedia Intermediate yoldia Yoldiidae benthic native
Posterula sarsii Stomachetosellidae sessile native
Potamethus malmgreni Sabellidae benthic native
Potamilla neglecta Sabellidae benthic native
Pourtalesia alcocki Pourtalesiidae benthic native
Pourtalesia jeffreysi Pourtalesiidae benthic native
Pourtalesia miranda Pourtalesiidae benthic native
Praunus flexuosus Bent mysid shrimp Mysidae demersal native
Praxillella affinis Maldanidae benthic 2.0 native
Praxillella gracilis Maldanidae sessile 2.0 native
Praxillella praetermissa Maldanidae demersal native
Praxillura longissima Maldanidae demersal native
Praxillura ornata Maldanidae demersal native
Priapulopsis bicaudatus Priapulidae benthic native
Priapulus caudatus Cactus worm Priapulidae benthic native
Prionospio cirrifera Spionidae benthic 2.0 native
Prionospio malmgreni Spionidae benthic 2.0 native
Prionospio steenstrupi Spionidae benthic native
Priscillina armata Pontoporeiidae benthic native
Proaeginina norvegica Caprellidae benthic native
Proameira simplex Ameiridae benthic native
Proboscina major Oncousoeciidae sessile native
Proceraea cornuta Syllidae benthic native
Proceraea prismatica Syllidae benthic native
Procerodes littoralis Procerodidae benthic 3.2 native
Procerolagena mollis Lagenidae benthic native
Proceropes secunda Adenopleurellidae benthic native
Prochaetoderma californicum Jawed glistenworm Prochaetodermatidae benthic native
Proclea emmi Terebellidae benthic native
Proclea graffii Terebellidae benthic native
Proclea malmgreni Terebellidae benthic native
Prognathorhynchus canaliculatus Gnathorhynchidae benthic native
Promesostoma balticum Promesostomidae benthic native
Promesostoma caligulatum Promesostomidae benthic native
Promesostoma gracilis Promesostomidae benthic native
Promesostoma marmoratum Promesostomidae benthic native
Promesostoma meixneri Promesostomidae benthic native
Promesostoma paracochlearis Promesostomidae benthic native
Promesostoma rostratum Promesostomidae benthic native
Promonotus schultzei Monocelididae benthic native
Proneomenia sluiteri Proneomeniidae benthic native
Propebela angulosa Mangeliidae benthic native
Propebela arctica Mangeliidae benthic 1.0 DL native
Propebela assimilis Mangeliidae benthic native
Propebela exarata Mangeliidae benthic native
Propebela harpularia Harp lora Mangeliidae benthic 1.7 DL native
Propebela nobilis Noble lora Mangeliidae benthic native
Propebela rugulata Mangeliidae benthic native
Propebela scalaris Mangeliidae benthic native
Propebela scalaroides Mangeliidae demersal native
Propebela spitzbergensis Mangeliidae benthic native
Propebela turricula Mangeliidae benthic 1.0 DL native
Proporus minimus Proporidae demersal native
Proschizorhynchella faroeensis Schizorhynchidae benthic native
Prosorhynchus squamatus Bucephalidae host native
Protellina arctica Caprellidae benthic native
Protellina ingolfi Caprellidae benthic native
Protis arctica Serpulidae sessile native
Protohydra leuckarti Protohydridae sessile native
Protomedeia fasciata Isaeidae benthic native
Protomedeia grandimana Isaeidae benthic native
Protosuberites capillitium Suberitidae sessile native
Provortex affinis Provorticidae benthic native
Provortex balticus Provorticidae benthic native
Provortex karlingi Provorticidae benthic native
Proxenetes deltoides Trigonostomidae benthic native
Proxenetes flabellifer Trigonostomidae benthic native
Proxenetes multidentatus Trigonostomidae benthic native
Proxenetes simplex Trigonostomidae benthic native
Psammosphaera fusca Psammosphaeridae benthic native
Pseudameira crassicornis Ameiridae benthic native
Pseudameira furcata Ameiridae benthic native
Pseudameira gracilis Ameiridae benthic native
Pseudarachna hirsuta Munnopsidae benthic native
Pseudaugaptilus polaris Augaptilidae benthic native
Pseudhaloptilus pacificus Augaptilidae benthic native
Pseudoamallothrix laminata Scolecitrichidae pelagic native
Pseudobradya arctica Ectinosomatidae benthic native
Pseudobradya major Ectinosomatidae benthic native
Pseudobradya minor Ectinosomatidae benthic native
Pseudocalanus acuspes Clausocalanidae benthic native
Pseudocalanus major Clausocalanidae benthic native
Pseudocalanus mimus Clausocalanidae benthic native
Pseudocalanus minutus Clausocalanidae pelagic native
Pseudocalanus newmani Clausocalanidae benthic native
Pseudocheles chacei Bresiliidae benthic native
Pseudochirella batillipa Aetideidae benthic native
Pseudochirella spectabilis Aetideidae pelagic native
Pseudocuma cercarioides Pseudocumatidae demersal native
Pseudocuma gracile Pseudocumatidae demersal native
Pseudocuma graciloides Pseudocumatidae demersal native
Pseudocuma tenuicauda Pseudocumatidae demersal native
Pseudoflustra anderssoni Smittinidae sessile native
Pseudoflustra birulai Smittinidae sessile native
Pseudoflustra hincksi Smittinidae sessile native
Pseudoflustra sinuosa Smittinidae sessile native
Pseudoflustra solida Smittinidae sessile native
Pseudograffilla arenicola Graffillidae demersal native
Pseudohaplogonaria stylifera Haploposthiidae benthic native
Pseudoliomesus ooides Nut whelk Buccinidae benthic native
Pseudomesochra laptevensis Pseudotachidiidae benthic native
Pseudomesus brevicornis Desmosomatidae benthic native
Pseudomma affine Mysidae benthic native
Pseudomma roseum Mysidae demersal native
Pseudomma truncatum Mysidae benthic native
Pseudomysis abyssi Mysidae benthic native
Pseudonodosinella nodulosa Hormosinidae benthic native
Pseudopallene brevicollis Callipallenidae benthic native
Pseudopallene circularis Callipallenidae benthic native
Pseudopallene spinipes Callipallenidae benthic native
Pseudopotamilla reniformis Gregarious fanworm Sabellidae sessile native
Pseudosagitta maxima Sagittidae pelagic-oceanic 9.0 BL native
Pseudoscalibregma parvum Scalibregmatidae benthic native
Pseudoschizorhynchoides ruber Schizorhynchidae benthic native
Pseudosphyrapus anomalus Sphyrapidae benthic native
Pseudostomum quadrioculatum Pseudostomidae benthic native
Pseudosuberites montiniger Peachball sponge Suberitidae sessile native
Pseudosuberites sadko Suberitidae sessile native
Pseudotanais affinis Pseudotanaidae benthic native
Pseudotanais forcipatus Pseudotanaidae benthic native
Pseudotanais lilljeborgi Pseudotanaidae benthic native
Pseudotanais macrocheles Pseudotanaidae benthic native
Pseudotanais oculatus Pseudotanaidae benthic native
Psilaster andromeda Astropectinidae benthic native
Psiloteredo megotara Big-ear shipworm Teredinidae benthic native
Psolus fabricii Scarlet psolus Psolidae benthic native
Psolus japonicus Psolidae benthic native
Psolus peronii Psolidae benthic native
Psolus phantapus Arctic armored cucumber Psolidae benthic native
Psyllocamptus propinquus Ameiridae benthic native
Pteraster militaris Wrinkled sea star Pterasteridae benthic 3.2 native
Pteraster obscurus Obscure cushion star Pterasteridae benthic native
Pteraster pulvillus Orange cushion star Pterasteridae benthic native
Pterastericola fedotovi Pterastericolidae benthic native
Pterocuma pectinatum Pseudocumatidae demersal native
Pterocuma rostratum Pseudocumatidae demersal native
Pterocuma sowinskyi Pseudocumatidae demersal native
Pterolysippe vanelli Ampharetidae benthic native
Ptychodactis patula Ptychodactiidae sessile native
Ptychogastria polaris Ptychogastriidae pelagic native
Ptychogena lactea Laodiceidae pelagic 9.0 WD native
Ptychopera westbladi Trigonostomidae benthic native
Puffinus gravis Greater shearwater Procellariidae others 53.0 TL 4.3 native
Puffinus tenuirostris Short-tailed shearwater Procellariidae others 43.0 TL 4.1 native
Pullenia bulloides Nonionidae benthic native
Pulsellum lobatum Lobate toothshell Pulsellidae benthic 2.3 DL native
Punctulum wyvillethomsoni Rissoidae demersal 0.4 DL native
Puncturella noachina Diluvian puncturella Fissurellidae benthic 1.2 DL native
Puncturella profundi Fissurellidae demersal 0.6 DL native
Pusa hispida Ringed seal Phocidae bathydemersal 165.0 TL 4.5 native
Pusillina tumidula Rissoidae benthic native
Pycnanthus densus Actinostolidae sessile native
Pycnanthus laevis Silky sea anemone Actinostolidae sessile native
Pycnophyes mokievskii Pycnophyidae benthic native
Pycnophyes spitsbergensis Pycnophyidae benthic native
Pygospio elegans Spionidae benthic 2.0 native
Pyrgo elongata Hauerinidae benthic native
Pyrgo williamsoni Hauerinidae benthic native
Pyrgoella sphaera Miliolidae benthic native
Pyrulofusus deformis Warped whelk Buccinidae benthic 11.0 DL native
Pyrulofusus melonis Giant melon whelk Buccinidae benthic native
Quasillina brevis Short bladder horny sponge Polymastiidae sessile native
Quasimelita quadrispinosa Melitidae benthic native
Quinqueloculina arctica Hauerinidae benthic native
Quinqueloculina lamarckiana Hauerinidae reef-associated native
Quinqueloculina seminula Hauerinidae reef-associated native
Radiella sol Sun horny sponge Polymastiidae sessile native
Raphitoma leufroyi Raphitomidae benthic native
Rathkea octopunctata Rathkeidae pelagic 0.5 WD 3.2 native
Recurvoides turbinatus Ammosphaeroidinidae benthic native
Reophax scorpiurus Hormosinidae benthic native
Retepora beaniana Reteporidae sessile native
Retifusus roseus Rosy whelk Buccinidae benthic native
Retigyra millipunctata Turbinidae demersal 0.2 DL native
Retusa obtusa Arctic barrel-bubble Retusidae benthic 0.4 DL native
Retusa pellucida Retusidae demersal native
Retusa semen Retusidae benthic native
Retusa umbilicata Perforated bubble-shell Retusidae benthic 0.3 DL native
Rhabdammina abyssorum Rhabdamminidae benthic native
Rhabdopleura normani Rhabdopleuridae demersal native
Rhachotropis aculeata Eusiridae benthic native
Rhachotropis helleri Eusiridae benthic native
Rhachotropis inflata Eusiridae benthic native
Rhachotropis lomonosovi Eusiridae benthic native
Rhachotropis macropus Eusiridae benthic native
Rhachotropis oculata Eusiridae benthic native
Rhamphostomella costata Umbonulidae sessile native
Rhamphostomella ovata Umbonulidae sessile native
Rhamphostomella scabra Umbonulidae sessile native
Rhizocaulus verticillatus Horsetail hydroid Campanulariidae sessile native
Rhizogeton nudum Oceanidae sessile native
Rhizomolgula globularis Molgulidae sessile native
Rhizorhagium roseum Creeping orange hydroid Bougainvilliidae sessile native
Rhizothrix curvata Rhizotrichidae benthic native
Rhizothrix scotti Rhizotrichidae benthic native
Rhodine attenuata Maldanidae demersal native
Rhodine bitorquata Maldanidae demersal native
Rhodine gracilior Maldanidae sessile 2.0 native
Rhodine loveni Maldanidae benthic native
Rhodostethia rosea Ross's gull Laridae others 32.0 TL 3.9 native
Rimapenaeus constrictus Roughneck shrimp Penaeidae benthic 9.2 TL native
Rissa tridactyla Black-legged kittiwake Laridae others 4.5 native
Rissoa parva Thick-lipped ribbed rissoa Rissoidae benthic native
Rissoella globularis Rissoellidae demersal native
Rissopsetia islandica Pyramidellidae demersal 0.3 DL native
Rossia macrosoma Stout bobtail Sepiolidae benthic 4.0 native
Rossia moelleri Sepiolidae benthopelagic 4.0 native
Rossia pacifica North Pacific bobtail Sepiolidae benthic 3.8 native
Rossia palpebrosa Warty bobtail squid Sepiolidae demersal 3.6 native
Rostroculodes borealis Oedicerotidae benthic native
Rostroculodes vibei Oedicerotidae benthic native
Rugiloricus polaris Pliciloricidae benthic 0.0 TL native
Rugulina fragilis Pendromidae demersal 0.3 DL native
Sabinea hystrix Crangonidae benthic native
Sabinea sarsii Sars shrimp Crangonidae benthic native
Sabinea septemcarinata Sevenline shrimp Crangonidae benthic native
Saccammina sphaerica Saccamminidae benthic native
Saccoglossus mereschkowskii Harrimaniidae demersal native
Saccorhiza ramosa Phyllariaceae sessile native
Saduria entomon Chaetiliidae benthic 3.3 native
Saduria megalura Chaetiliidae benthic native
Saduria sabini Chaetiliidae benthic native
Saduria sibirica Chaetiliidae benthic native
Sagartiogeton robustus Sagartiidae sessile native
Salpa fusiformis Common salp Salpidae pelagic-neritic 5.2 TL native
Salpa maxima Salpidae pelagic 10.0 TL native
Samythella elongata Ampharetidae benthic native
Samythella neglecta Ampharetidae benthic native
Sandalops melancholicus Melancholy cranch squid Cranchiidae pelagic 11.0 ML 4.5 native
Sarsameira difficilis Ameiridae benthic native
Sarsameira major Ameiridae benthic native
Sarsia princeps Corynidae pelagic-neritic 4.0 H native
Sarsia tubulosa Clapper hydroid Corynidae pelagic 1.8 H 3.4 native
Sarsiflustra abyssicola Flustridae sessile native
Sasakiopus salebrosus Rough octopus Octopodidae benthic native
Scabrotrophon fabricii Muricidae demersal 4.9 DL native
Scalibregma inflatum Scalibregmatidae benthic 8.0 TL 2.0 native
Scalpellum striolatum Scalpellidae sessile native
Scalpellum stroemii Scalpellidae sessile native
Scaphander punctostriatus Giant canoe-bubble Cylichnidae benthic 3.6 DL native
Scaphocalanus brevicornis Scolecitrichidae pelagic native
Scaphocalanus magnus Scolecitrichidae pelagic native
Scaphocalanus polaris Scolecitrichidae benthic native
Schaudinnia rosea Rossellidae sessile native
Schistomeringos caeca Dorvilleidae pelagic native
Schizoplax brandtii Callochitonidae benthic 1.7 TL native
Schizoporella costata Schizoporellidae sessile native
Schizorhamphus bilamellatus Pseudocumatidae demersal native
Schizorhynchoides spirostylus Schizorhynchidae benthic native
Schuchertinia allmanii Hydractiniidae sessile native
Scina borealis Scinidae pelagic native
Sclerocrangon boreas Sculptured shrimp Crangonidae benthic 3.1 native
Sclerocrangon ferox Crangonidae benthic native
Sclerolinum contortum Siboglinidae sessile native
Scolelepis korsuni Spionidae benthic native
Scolelepis squamata Spionidae benthic 2.0 native
Scoletoma fragilis Lumbrineridae benthic native
Scoletoma impatiens Lumbrineridae benthic native
Scoletoma tetraura False earthworm Lumbrineridae benthic native
Scoloplos armiger Armed bristleworm Orbiniidae benthic 12.0 TL 2.0 native
Scoloplos schmitti Orbiniidae demersal native
Scypha ciliata Little vase sponge Sycettidae sessile native
Semibugula birulai Bicellariellidae sessile native
Semirossia tenera Lesser shining bobtail Sepiolidae benthic native
Semisuberites cribrosa Vase sponge Esperiopsidae sessile 30.0 H native
Sergestes atlanticus Sergestidae bathypelagic 3.3 native
Sergestes corniculum Sergestidae pelagic native
Sergestes cornutus Sergestidae pelagic native
Sergestes edwardsii Sergestidae pelagic 3.2 native
Sergestes henseni Sergestidae pelagic 3.2 native
Sergestes paraseminudus Sergestidae pelagic 3.3 native
Sergestes pestafer Sergestidae pelagic native
Sergestes similis Sergestidae pelagic native
Sergestes vigilax Sergestidae pelagic 3.2 native
Sergia grandis Sergestidae pelagic native
Sergia japonica Sergestidae pelagic native
Sergia robusta Sergestidae bathypelagic native
Sergia scintillans Sergestidae pelagic 3.4 native
Sergia splendens Sergestidae pelagic 3.6 native
Sergia tenuiremis Sergestidae pelagic 3.2 native
Serripes groenlandicus Greenland smoothcockle Cardiidae benthic 11.0 SHL native
Serripes laperousii Broad smoothcockle Cardiidae benthic native
Sertularella polyzonias Great tooth hydroid Sertulariidae sessile native
Sertularella rugosa Snail trefoil hydroid Sertulariidae sessile native
Sertularella tenella Sertulariidae sessile native
Sertularia argentea Squirrel's tail hydroid Sertulariidae sessile native
Sertularia mirabilis Sertulariidae benthic native
Sertularia plumosa Sertulariidae sessile native
Sertularia robusta Sertulariidae sessile native
Sertularia schmidti Sertulariidae sessile native
Sertularia similis Sertulariidae sessile native
Sertularia tenera Sertulariidae sessile native
Siboglinum hyperboreum Siboglinidae sessile native
Sicyonia burkenroadi Spiny rock shrimp Sicyoniidae benthic native
Sicyonia dorsalis Lesser rock shrimp Sicyoniidae benthic 7.1 TL native
Sicyonia laevigata Notched tidal rock shrimp Sicyoniidae benthic native
Sicyonia olgae Sicyoniidae benthic native
Sicyonia parri Sicyoniidae benthic native
Sicyonia stimpsoni Eyespot rock shrimp Sicyoniidae benthic native
Sicyonia typica Kinglet rock shrimp Sicyoniidae benthic native
Sigambra healyae Pilargidae pelagic native
Sigambra tentaculata Pilargidae benthic native
Similipecten greenlandicus Greenland glass-scallop Propeamussiidae benthic 2.5 DL native
Sinuolinea sinuosa Sinuolineidae host native
Siphonodentalium lobatum Gadilidae benthic 3.5 native
Siphonoecetes typicus Ischyroceridae benthic native
Skenea basistriata Mollu benthic 0.2 DL native
Skenea ferruginea Turbinidae demersal 0.2 DL native
Skenea ossiansarsi Mollu benthic native
Skenea peterseni Turbinidae demersal 0.2 DL native
Skenea rugulosa Mollu demersal 0.1 DL native
Skenea trochoides Mollu demersal 0.3 DL native
Skeneopsis planorbis Flat skenea Skeneopsidae demersal 0.2 DL native
Skogsbergia megalops Cypridinidae pelagic native
Sminthea arctica Rhopalonematidae pelagic native
Smittina glaciata Smittinidae sessile native
Smittoidea reticulata Schizoporellidae sessile native
Socarnes bidenticulatus Lysianassidae benthic native
Socarnes vahlii Lysianassidae benthic native
Solariella obscura Obscure solarelle Trochidae benthic 0.9 DL native
Solariella varicosa Varicose solarelle Trochidae benthic 0.6 DL native
Solaster stimpsoni Striped sun star Solasteridae benthic 3.2 native
Solemya valvulus Pacific awningclam Solemyidae benthic native
Solenocera atlantidis Dwarf humpback shrimp Solenoceridae benthic 1.9 CL native
Solenocera mutator Blossom shrimp Solenoceridae benthic 9.0 TL native
Solenocera necopina Deepwater humpback shrimp Solenoceridae benthic 2.7 CL native
Solenocera vioscai Humpback shrimp Solenoceridae benthic 3.1 CL native
Solmundella bitentaculata Aeginidae pelagic 1.2 WD native
Somateria fischeri Spectacled eider Anatidae others 3.5 native
Somateria mollissima Common eider Anatidae others 3.8 native
Somateria spectabilis King eider Anatidae others 3.3 native
Sorosphaera confusa Psammosphaeridae benthic native
Sosane bathyalis Ampharetidae benthic native
Sphaerodoridium claparedii Sphaerodoridae benthic native
Sphaerodoropsis minuta Sphaerodoridae benthic native
Sphaerodoropsis philippi Sphaerodoridae benthic native
Sphaerodorum flavum Sphaerodoridae benthic native
Sphaerodorum gracilis Sphaerodoridae benthic native
Sphaerotylus capitatus Polymastiidae sessile native
Sphyrapus malleolus Sphyrapidae benthic native
Spinocalanus abyssalis Spinocalanidae pelagic native
Spinocalanus antarcticus Spinocalanidae pelagic native
Spinocalanus elongatus Spinocalanidae benthic native
Spinocalanus horridus Spinocalanidae pelagic native
Spinocalanus longicornis Spinocalanidae pelagic native
Spinocalanus polaris Spinocalanidae benthic native
Spinther wireni Spintheridae benthic native
Spio armata Spionidae benthic native
Spio decoratus Spionidae benthic native
Spio filicornis Spionidae benthic 3.0 TL 2.0 native
Spio martinensis Spionidae benthic native
Spio theeli Spionidae benthic native
Spiochaetopterus typicus Chaetopteridae benthic native
Spiophanes kroeyeri Spionidae benthic native
Spiophanes kroyeri Spionidae benthic 3.0 TL native
Spirontocaris arcuata Rathbun blade shrimp Thoridae benthic native
Spirontocaris intermedia Thoridae benthic native
Spirontocaris lamellicornis Dana's blade shrimp Thoridae benthic native
Spirontocaris liljeborgii Friendly blade shrimp Thoridae benthic native
Spirontocaris phippsii Punctuate blade shrimp Thoridae benthic native
Spirontocaris spinus Parrot shrimp Thoridae benthic 2.9 native
Spirorbis spirillum Serpulidae sessile native
Spongionella pulchella Gorgeous horny sponge Dictyodendrillidae sessile native
Stauropathes arctica Arctic black coral Schizopathidae sessile native
Staurostoma mertensii Whitecross jellyfish Laodiceidae benthopelagic 20.0 WD native
Stauroteuthis syrtensis Balloon octopod Stauroteuthidae pelagic 11.4 ML 3.1 native
Stegocephalopsis ampulla Stegocephalidae benthic native
Stegocephalus ampulla Stegocephalidae benthic native
Stegocephalus inflatus Stegocephalidae benthic native
Stegophiura nodosa Ophiuridae benthic native
Stegoplax longirostris Amphilochidae benthic native
Stegopoma giganteum Tiarannidae demersal native
Stegopoma plicatile Tiarannidae sessile native
Stelletta normani Ancorinidae sessile native
Stelodoryx flabellata Myxillidae sessile native
Stelodoryx toporoki Myxillidae sessile native
Stenella coeruleoalba Striped dolphin Delphinidae pelagic-oceanic 260.0 TL 4.5 native
Stenhelia curviseta Miraciidae benthic native
Stenopus hispidus Banded coral shrimp Stenopodidae benthic native
Stenopus scutellatus Yellowbanded coral shrimp Stenopodidae benthic native
Stenosemus albus White nothern chiton Ischnochitonidae benthic 1.3 TL native
Stephanasterias albula Odd rayed star Asteriidae benthic native
Stercorarius longicaudus Long-tailed jaeger Stercorariidae pelagic 58.0 TL 3.8 native
Stercorarius parasiticus Parasitic jaeger Stercorariidae others 67.0 TL 4.2 native
Stercorarius pomarinus Pomarine jaeger Stercorariidae others 78.0 TL 5.0 native
Stereomastis nana Polychelidae benthic 4.9 CL native
Stereomastis sculpta Blind lobsters Polychelidae benthic 3.8 native
Sterna paradisaea Arctic tern Laridae others 38.0 TL 4.2 native
Sternaspis scutata Scutate stermaspid worm Sternaspidae benthic 2.0 native
Stigmatoteuthis hoylei Flowervase jewel squid Histioteuthidae pelagic 24.0 ML 3.5 native
Stomphia coccinea Swimming anemone Actinostolidae sessile 12.5 WD native
Strongylocentrotus droebachiensis Northern sea urchin Strongylocentrotidae benthic 10.0 WD 2.4 native
Strongylocentrotus pallidus Pale urchin Strongylocentrotidae benthic native
Stryphnus ponderosus Ponderous horny sponge Ancorinidae sessile native
Styela coriacea Pimpled sea squirt Styelidae sessile 3.0 H native
Styela macrenteron Styelidae sessile native
Styela rustica Styelidae sessile native
Stylaster erubescens Stylasteridae sessile native
Stylaster roseus Stylasteridae sessile native
Stylocordyla borealis Boreal horny sponge Stylocordylidae sessile native
Stylodactylus licinus Stylodactylidae benthic native
Suberites cebriones Suberitidae sessile native
Suberites concinnus Suberitidae sessile native
Suberites domuncula Sea-orange Suberitidae sessile native
Suberites montalbidus Suberitidae sessile native
Suberites spermatozoon Suberitidae sessile native
Suberites virgultosus Suberitidae sessile native
Sycettusa kuekenthali Heteropiidae sessile native
Sycon arcticum Sycettidae sessile native
Syllidia armata Hesionidae benthic native
Syllis alternata Syllidae benthic native
Syllis armillaris Syllidae benthic native
Syllis cornuta Syllidae benthic 3.0 TL native
Syllis fasciata Syllidae benthic native
Syllis gracilis Syllidae benthic native
Syllis quaternaria Syllidae benthic native
Sylon hippolytes Clistosaccidae host native
Sympagohydra tuuli Protohydridae sessile native
Symplectoscyphus pinnatus Sertulariidae sessile native
Symplectoscyphus tricuspidatus Sertulariidae sessile native
Synarachnactis brachiolata Cerianthidae sessile native
Syndesmis echinorum Umagillidae host native
Synidotea bicuspida Idoteidae benthic native
Synidotea marmorata Idoteidae benthic native
Synidotea muricata Idoteidae benthic native
Synoicum pulmonaria Polyclinidae sessile 2.5 TL native
Synthliboramphus antiquus Ancient murrelet Alcidae others 27.0 TL 4.2 native
Syrrhoe crenulata Synopiidae benthic native
Systellaspis affinis Oplophoridae pelagic native
Systellaspis braueri Quayle spinytail Oplophoridae pelagic native
Systellaspis debilis Oplophoridae bathypelagic 3.3 native
Systellaspis pellucida Oplophoridae bathypelagic 3.5 native
Tachidius discipes Tachidiidae benthic native
Tachyrhynchus erosus Eroded turretsnail Turritellidae benthic 2.5 DL native
Tachyrhynchus reticulatis Turritellidae benthic native
Tachyrhynchus reticulatus Reticulated turretsnail Turritellidae benthic 2.5 DL native
Tachytrypane jeffreysi Opheliidae benthic native
Tacita danielsseni Buccinidae benthic 3.9 DL native
Taonius pavo Peacock cranch squid Cranchiidae pelagic 66.0 ML native
Taranis moerchii Conidae demersal 0.5 DL native
Tarasovium cornutum Eared barnacle Scalpellidae sessile native
Tealia coriacea Actiniidae sessile native
Tectura testudinalis Plant limpet Lottiidae benthic 4.0 TL native
Tectura virginea Lottiidae benthic native
Tedania suctoria Papilliferous horny sponge Tedaniidae sessile native
Tegastes falcatus Tegastidae benthic native
Tegastes nanus Tegastidae benthic native
Tegella armifera Calloporidae sessile native
Tegella inermis Calloporidae sessile native
Tellina nuculoides Salmon tellin Tellinidae benthic 2.0 SHL native
Telmessus cheiragonus Helmet crab Cheiragonidae benthic 10.0 CW native
Temorites brevis Bathypontiidae pelagic native
Tenellia adspersa Miniature aeolis Tergipedidae benthic 0.7 TL introduced
Tentorium semisuberites Pavilion horny sponge Polymastiidae sessile native
Terebellides gracilis Trichobranchidae benthic native
Terebellides stroemii Stroem's trichobranchid worm Trichobranchidae benthic 6.0 TL 2.0 native
Terebratulina septentrionalis Northern lamp shell Cancellothyrididae benthic 5.0 TL native
Teredo navalis Naval shipworm Teredinidae benthic 50.0 TL introduced
Tergipes tergipes Johnston's balloon eolis Tergipedidae benthic native
Terminoflustra membranaceo-truncata Flustridae epiphytic native
Testudinalia testudinalis Common tortoiseshell limpet Lottiidae demersal 4.0 DL native
Tetilla sandalina Tetillidae sessile native
Tetilla sibirica Siberian horny sponge Tetillidae sessile native
Tetrapoma quadridentatum Campanulinidae sessile native
Tetraposthia colymbetes Childiidae benthic native
Tetrastemma bicolor Tetrastemmatidae benthic 6.0 TL native
Tetrastemma candidum Tetrastemmatidae benthic native
Thalassoanaperus biaculeatus Convolutidae benthic native
Tharybis groenlandica Tharybidae pelagic native
Tharyx acutus Cirratulidae benthic native
Tharyx alaskensis Cirratulidae benthic native
Tharyx kirkegaardi Cirratulidae benthic native
Thelepus cincinnatus Terebellidae benthic native
Themisto abyssorum Hyperiidae pelagic 1.8 TL 3.1 native
Themisto libellula Hyperiidae pelagic 2.9 native
Themisto pacifica Hyperiidae pelagic native
Thenea abyssorum Abyssal horny sponge Pachastrellidae sessile native
Thenea muricata Mulberry horny sponge Pachastrellidae sessile native
Thenea valdiviae Pachastrellidae sessile native
Thesbia nana Turridae benthic native
Thetys vagina Virgin salpa Salpidae pelagic 12.0 TL native
Tholosina bulla Hemisphaeramminidae benthic native
Thorina spinosa Caprellidae benthic native
Thracia devexa Sloping thracia Thraciidae benthic native
Thracia myopsis Arctic thracia Thraciidae benthic native
Thracia septentrionalis Northern thracia Thraciidae benthic native
Thuiaria arctica Sertulariidae sessile native
Thuiaria articulata Sea spleenwort Sertulariidae sessile native
Thuiaria carica Sertulariidae sessile native
Thuiaria laxa Sertulariidae sessile native
Thuiaria thuja Bottlebrush hydroid Sertulariidae sessile native
Thurammina favosa Saccamminidae benthic native
Thurammina papillata Saccamminidae benthic native
Thyasira flexuosa Flexuose cleftclam Thyasiridae benthic 1.2 SHL 2.0 native
Thyasira gouldii Thyasiridae benthic 0.6 DL native
Thyasira sarsii Thyasiridae benthic 2.4 DL native
Thylacorhynchus conglobatus Schizorhynchidae benthic native
Thylacorhynchus pyriferus Schizorhynchidae benthic native
Thysanoessa inermis Euphausiidae pelagic 3.2 TL 2.0 native
Thysanoessa longicaudata Euphausiidae pelagic 2.6 native
Thysanoessa longipes Euphausiidae pelagic 3.0 TL 3.0 native
Thysanoessa raschii Euphausiidae pelagic 2.5 TL 2.2 native
Thysanoteuthis rhombus Rhomboid squid Thysanoteuthidae pelagic 130.0 ML 4.5 native
Tiaropsis multicirrata Tiaropsidae pelagic 2.0 WD native
Tindaria derjugini Tindariidae benthic endemic
Tiron acanthurus Synopiidae benthic native
Tiron spiniferum Synopiidae benthic native
Tisbe furcata Tisbidae benthic 2.0 native
Tmetonyx acutus Uristidae benthic native
Tmetonyx cicada Uristidae benthic native
Tmetonyx similis Uristidae benthic native
Todarodes sagittatus European flying squid Ommastrephidae benthopelagic 75.0 ML 4.2 native
Tole alascensis Not assigned benthic native
Tole laciniata Not assigned benthic native
Toledonia limnaeoides Diaphanidae benthic 0.3 DL native
Tomopteris septentrionalis Tail-less Pacific transparent-worm Tomopteridae benthic native
Tonicella marmorea Mottled red chiton Tonicellidae benthic 2.5 TL native
Topsentia disparilis Halichondriidae sessile native
Tortanus discaudatus Tortanidae pelagic native
Tralia ovula Egg melampus Ellobiidae benthic native
Travisia brevis Opheliidae demersal native
Travisia carnea Opheliidae demersal native
Travisia forbesii Opheliidae benthic 2.0 native
Tremaster mirabilis Asterinidae benthic native
Tremoctopus violaceus Violet blanket octopods Tremoctopodidae pelagic 100.0 TL native
Tricellaria gracilis Scrupocellariidae sessile native
Tricellaria ternata Candidae sessile native
Trichasterina borealis Rossellidae sessile native
Trichobranchus glacialis Trichobranchidae benthic 3.0 TL native
Trichotropis bicarinata Two-keel hairysnail Capulidae benthic 3.7 DL native
Trichotropis cancellata Cancellate hairysnail Capulidae benthic 3.0 SHH native
Trichotropis conica Capulidae benthic 1.8 DL native
Trichotropis insignis Gray hairysnail Capulidae benthic 2.5 DL native
Triconia borealis Oncaeidae pelagic native
Triconia conifera Oncaeidae pelagic native
Trididemnum tenerum Didemnidae sessile native
Triloculina tricarinata Miliolidae benthic native
Tritella pilimana Protellidae benthic native
Trochochaeta carica Trochochaetidae benthic native
Trochochaeta multisetosa Trochochaetidae benthic native
Trochoderma elegans Myriotrochidae benthic native
Trophon truncatus Muricidae demersal 2.7 DL native
Trophonopsis barvicensis Muricidae benthic native
Trophonopsis beringi Muricidae benthic native
Trophonopsis truncatus Muricidae benthic native
Tryphosella nanoides Tryphosidae benthic native
Tryphosella schneideri Tryphosidae benthic native
Tubulanus annulatus Football-jersey worm Tubulanidae benthic native
Tubularia indivisa Tall tubularia Tubulariidae sessile native
Tubularia regalis Tubulariidae sessile native
Tubulipora fruticosa Tubuliporidae sessile native
Tubulipora nordgaardi Tubuliporidae sessile native
Tubulipora ventricosa Tubuliporidae sessile native
Tulpa crenata Campanulariidae sessile native
Turrisipho lachesis Buccinidae benthic 8.0 DL native
Turrisipho voeringi Buccinidae benthic 7.7 DL native
Turritellopsis stimpsoni Needle turretsnail Mathildidae benthic native
Tursiops truncatus Bottlenose dolphin Delphinidae pelagic 380.0 TL 4.5 native
Turtonia minuta Minute turton Veneridae benthic 0.3 DL native
Tylodesma rosea Desmacellidae sessile native
Typhloscolex muelleri Typhloscolecidae benthic native
Typhlotanais finmarchicus Typhlotanaidae benthic native
Typhlotanais irregularis Typhlotanaidae benthic native
Ulva intestinalis Hollow green nori Ulvaceae sessile 20.0 H native
Ulva lactuca Sea lettuce Ulvaceae sessile 100.0 TL native
Umbellula encrinus Lily sea pen Umbellulidae sessile native
Uncinorhynchus flavidus Gnathorhynchidae benthic native
Unciola crassipes Aoridae benthic native
Unciola laticornis Aoridae benthic native
Unciola leucopis Aoridae benthic native
Undinella oblonga Tharybidae benthic native
Urasterias lincki Asteriidae benthic native
Urastoma cyprinae Urastomidae host native
Urechinus naresianus Urechinidae benthic native
Uria aalge Common murre Alcidae others 43.0 TL 4.2 native
Uria lomvia Thick-billed murre Alcidae others 48.0 TL 3.2 native
Ursus maritimus Polar bear Ursidae demersal 250.0 TL 3.7 native
Urticina crassicornis Mottled anemone Actiniidae sessile 20.0 WD 3.6 native
Urticina felina Painted anemone Actiniidae sessile native
Utelga heinckei Koinocystididae benthic native
Uteriporus vulgaris Uteriporidae benthic native
Vampyroteuthis infernalis Vampire squid Vampyroteuthidae pelagic 3.4 native
Velutina conica Conical lamellaria Velutinidae benthic native
Velutina plicatilis Oblique lamellaria Velutinidae benthic 2.7 DL native
Velutina schneideri Velutinidae demersal native
Velutina undata Wavy lamellaria Velutinidae benthic native
Velutina velutina Smooth lamellaria Velutinidae benthic 2.8 DL native
Verruca stroemia Verrucidae sessile native
Virgularia mirabilis Elegant sea pen Virgulariidae sessile native
Vitreledonella richardi Glass octopod Vitreledonellidae bathypelagic 45.0 TL native
Volgacuma telmatophora Pseudocumatidae demersal native
Volutomitra groenlandica False greenland miter Volutomitridae demersal native
Volutopsius castaneus Volute whelk Buccinidae demersal 1.2 DL native
Volutopsius fragilis Fragile whelk Buccinidae benthic 2.3 DL native
Volutopsius norwegicus Norway whelk Buccinidae benthic 8.0 DL native
Vulpes lagopus Arctic fox Canidae demersal native
Walvisteuthis virilis Whale squid Walvisteuthidae pelagic 10.3 ML native
Weelia cylindrica Salpidae pelagic native
Wellstenhelia melpomene Miraciidae benthic native
Weltnerium nymphocola Scalpellidae sessile native
Westwoodilla abyssalis Oedicerotidae benthic native
Westwoodilla brevicalcar Oedicerotidae benthic native
Westwoodilla caecula Oedicerotidae benthic native
Westwoodilla megalops Oedicerotidae benthic native
Weyprechtia heuglini Calliopiidae benthic native
Weyprechtia pinguis Calliopiidae benthic native
Wigginsia wigginsi Acarnidae sessile native
Xanthocalanus borealis Phaennidae pelagic native
Xanthocalanus polaris Phaennidae benthic native
Xanthocalanus profundus Phaennidae pelagic native
Xema sabini Sabine's gull Laridae others 4.1 native
Xenodice frauenfeldti Podoceridae benthic native
Xestoleberis depressa Xestoleberididae benthic native
Xiphopenaeus kroyeri Atlantic seabob Penaeidae benthic 17.0 TL 3.4 native
Yakovia polinae Corymorphidae pelagic native
Ymerana pteropoda Ampharetidae benthic native
Yoldia aeolica Yoldiidae benthic native
Yoldia hyperborea Northern yoldia Yoldiidae benthic native
Yoldia limatula File yoldia Yoldiidae benthic 5.0 DL native
Yoldia myalis Oval yoldia Yoldiidae benthic native
Yoldia sapotilla Shot yoldia Yoldiidae benthic 3.5 DL native
Yoldia seminuda Oblique-lined yoldia Yoldiidae benthic 4.0 TL native
Yoldiella annenkovae Yoldiidae benthic native
Yoldiella frami Yoldiidae benthic endemic
Yoldiella frigida Frigid yoldia Yoldiidae benthic 0.4 DL native
Yoldiella intermedia Yoldiidae benthic native
Yoldiella lenticula Lenticulate yoldia Yoldiidae benthic native
Yoldiella lucida Iridescent yoldia Yoldiidae benthic native
Yoldiella nana Sibling yoldia Yoldiidae benthic native
Yoldiella propinqua Yoldiidae benthic native
Yoldiella solidula Yoldiidae benthic 0.4 DL native
Yoldiella tamara Arctic miniature-nutclam Yoldiidae benthic endemic
Zelentia pustulata Pimpled aeolid Trinchesiidae benthic 2.0 TL native
Zonorhynchus salinus Cicerinidae benthic native
Zonorhynchus seminascatus Cicerinidae benthic native
Zosime incrassata Zosimeidae benthic native
Zosime valida Zosimeidae benthic native
Zostera marina Eel-grass Zosteraceae sessile native
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