Guam country information

Common names: [No common name]
Occurrence: native
Salinity: marine
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: M: Ref. 121705.
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/gq.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Jarms, G. and A.C. Morandini (eds.), 2019
National Database:

Common names from other countries

Helmet jellyfish, ... more

Classification / Names / Names Namen | Synonyme | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS

> Coronatae (Crown jellyfishes) > Periphyllidae ()

Environment: milieu / climate zone / depth range / distribution range Ökologie

Pelagisch; tiefenbereich 0 - 2900 m (Ref. 116114), usually 0 - 300 m (Ref. 121705). Tropical; 70°N - 78°S, 180°W - 180°E

Verbreitung Länder | FAO Gebiete | Ecosystems | Vorkommen | Einführungen

Circumglobal.

Length at first maturity / Size / Gewicht / Alter

Maturity: L_m ? range ? - ? cm Max length : 35.0 cm WD Männchen/unbestimmt; (Ref. 121705)

Kurzbeschreibung Morphologie

Up to 20 cm wide; usually higher than wide, with a pointed or dome-shaped apex; gonads U-shaped; stomach and subumbrella purple or violet.

Found In deep waters (Ref. 116114). Symbiotic with amphipods, Hyperoche medusarum, Cyllopus magellanicus and juvenile Themisto guadichaudii (Ref. 3052), and has pycnogonids as an ectoparasite (Ref. 1943). Adults and juveniles of the pycnogonid Bathypallenopsis scoparia are found attached to this jellyfish (Ref. 121217). Exhibits vertical migration. Majority of the medusae moved from the deep basin to a zone below thermocline, a distance ranging from 100 to 400 m, at night. Move downward and disperse within water column below 200 to 350 m at dawn and during daylight hours, reside in narrow vertical intervals (about 60 m) in August and broader intervals (about 100 m) in December. Observed at water below thermocline at temperatures 6 to 8°C (Ref. 3051). Carcass and fresh samples used as bait of this species are scavenged by Myxine glutinosa, Munida tenuimana, Orchomenella obtusa, a decapod shrimp (Ref. 108800) and other unknown decapods (Ref. 108805).

Life cycle and mating behavior Geschlechtsreife | Fortpflanzung | Ablaichen | Eier | Fecundity | Larven

Members of the class Scyphozoa are gonochoric. Life cycle: Egg is laid by the adult medusa which later develops into a free-living planula, then to a scyphistoma to a strobila, and lastly to a free-living young medusa.

Hauptreferenz Referenzen | Koordinator | Partner

Migotto, A.E., A.C. Marques, A.C. Morandini and F.L. da Silveira. 2002. (Ref. 813)

IUCN Rote Liste Status (Ref. 130435)

Nicht untersucht

CITES Status (Ref. 108899)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Nutzung durch Menschen

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Estimates based on models

Preferred temperature (Ref. 115969): 1.7 - 6.4, mean 3.4 (based on 3792 cells).

Verwundbarkeit (Ref. 71543): Low vulnerability (10 of 100).

Preiskategorie (Ref. 80766): Unknown.

Periphylla periphylla (Péron & Lesueur, 1810)