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Mytella bicolor   (Bruguière, 1792)

Guyana swamp mussel

Classification Common names | Synonyms | CoL | ITIS | WoRMS

Bivalvia | Mytiloida | Mytilidae

Main reference References | Biblio | Coordinator | Collaborators

Leal, J.H. 2003. (Ref. 344)

Size / Weight / Age

Max length : 7.0 cm DL male/unsexed; (Ref. 83435); common length : 9.0 cm TL male/unsexed; (Ref. 344)



Climate / Range

Tropical; 30°N - 29°S, 114°W - 34°W

Distribution Countries | FAO areas | Ecosystems | Occurrences | Introductions

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

Short description

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

IUCN Red List Status (Ref. 114614)


CITES status (Ref. 94142)

Not Evaluated

Threat to humans


Human uses

Fisheries: commercial
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Internet sources

BHL | BOLD Systems | Check for other websites | Check FishWatcher | CISTI | DiscoverLife | FAO(Publication : search) | GenBank (genome, nucleotide) | GOBASE | Google Books | Google Scholar | Google | ispecies | PubMed | Scirus | FishBase | Tree of Life | uBio | uBio RSS | Wikipedia (Go, Search) | Zoological Record

Estimation of some characteristics with mathematical models

Price category (Ref. 80766)