Mytella guyanensis, Guyana swamp mussel : fisheries
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Mytella guyanensis   (Lamarck, 1819)

Guyana swamp mussel
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Mytella guyanensis
Picture by Freire, Katia de Meirelles Felizo

Classification / Names Common names | Synonyms | CoL | ITIS | WoRMS

Bivalvia | Mytilida | Mytilidae

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

Benthic.  Tropical; 30°N - 29°S, 114°W - 34°W

Distribution Territories | FAO areas | Ecosystems | Occurrences | Introductions

Eastern Central Pacific and Western Atlantic: Mexico and Southern Caribbean to southeast Brazil.

Length at first maturity / Size / Weight / Age

Maturity: Lm ?, range 2 - 4.296 cm Max length : 7.0 cm SHL male/unsexed; (Ref. 83435); common length : 9.0 cm SHL male/unsexed; (Ref. 344)

Short description Morphology

Shell mussel-shaped, elongate, ventral region concave. Oblique ridge runs anterodorsal to posteroventral region of valve. Umbones subterminal. Posterior part of the mantle with branching tentacles. Colour: externally greenish on posterodorsal region (above ridge) and yellowish brown on anteroventral region (below ridge).

Biology     Glossary (e.g. epibenthic)

Intertidal in bays and protected areas, forming clumps attached to mangrove prop roots or other hard substrates (Ref. 344) via its byssus (Ref. 104222). Attached to mangrove roots, particularly on Rhizophorae mangle (Ref. 104222). Some found to be buried in substrate. Also occurs in a river estuary. Highly tolerant to salinity variations (Ref. 104223). Parasitic on this mussel are Rickettsia-like organisms, Apicomplexa and Platyhelminthes (Ref. 104222). In general, suspension feeding bivalves mainly depend on phytoplankton and detritus material for nutrition (Ref. 107088).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Life cycle: Embryos develop into free-swimming trocophore larvae, succeeded by the bivalve veliger, resembling a miniature clam (Ref. 833).

Main reference References | Coordinator | Collaborators

Leal, J.H. 2003 Bivalves. p. 25-98. In Carpenter, K.E. (ed.). The living marine resources of the Western Central Atlantic. Volume 1: Introduction, molluscs, crustaceans, hagfishes, sharks, batoid fishes, and chimaeras. FAO Species Identification Guide for Fishery Purposes and American Society of Ichthyologists and Herpetologists Special Publication No. 5. 1600p. (Ref. 344)

IUCN Red List Status (Ref. 130435: Version 2025-2 (Global))

  Not Evaluated 

CITES status (Ref. 108899)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless

Human uses

Fisheries: commercial
FAO - Publication: search | FishSource |

Tools

E-book | Field guide

More information

Trophic Ecology
Food items (preys)
Diet composition
Food consumption
Predators
Ecology
Ecology
Population dynamics
Growth
Max. ages / sizes
Length-weight rel.
Length-length rel.
Length-frequencies
Mass conversion
Abundance
Life cycle
Reproduction
Maturity
Fecundity
Spawning
Eggs
Egg development
Larvae
Distribution
Territories
FAO areas
Ecosystems
Occurrences
Introductions
Physiology
Oxygen consumption
Human Related
Stamps, coins, misc.
Outreach
Collaborators
Taxonomy
Common names
Synonyms
Morphology
Pictures
References
References

Internet sources

BHL | BOLD Systems | CISTI | DiscoverLife | FAO - Publication: search | Fishipedia | GenBank (genome, nucleotide) | GloBI | Gomexsi | Google Books | Google Scholar | Google | PubMed | Tree of Life | Wikipedia (Go, Search) | Zoological Record

Estimates based on models

Fishing Vulnerability
(Ref. 71543)		 Moderate vulnerability (40 of 100).
Price category
(Ref. 80766):		 Medium.