Blue mussel — Mytilus edulis

Overview

Named by Linnaeus in 1758, Mytilus edulis belongs to the family Mytilidae. It suspension-feeds on bacteria, phytoplankton, detritus and dissolved material. Individuals gather in dense beds bound by byssal threads, and multilayered beds create niches for other organisms. Young mussels settle within existing beds, but overcrowding, silt and accumulated waste can starve or smother animals underneath and weaken the attachment of a whole bed.

Sexes are separate, reproduction extends over a long annual season, and larvae feed in the plankton. Laboratory crosses between M. edulis and M. galloprovincialis showed disrupted mitochondrial inheritance in hybrid larvae: males can carry both maternal and paternal mitochondrial types, while females normally carry the maternal type. The authors suggested this disruption may contribute to hybrid mortality, a possible mechanism rather than proof of reproductive isolation.

Hybridization within Mytilus makes shell form alone an unreliable guide to species. A 2009 genetic study of 30 wild mussels from the Menai Strait in North Wales developed ten microsatellite markers showing 9 to 29 alleles across the sample, with some heterozygote deficiencies and suspected null alleles, and proposed them for work on species discrimination, introgression and hybridization.

Origins & earliest records

Living species, named by Linnaeus in 1758.

Evidence & interpretation

A species biology review built on earlier syntheses, plus genetic marker and controlled crossing studies.

Selected bibliography

Documented works and useful reading. This is not a list of every appearance.

1. 01

   Disruption of doubly uniparental inheritance of mitochondrial DNA in hybrid mussels (Mytilus edulis x M. galloprovincialis)

   Wood, Turner, Skibinski and Beaumont · 2003

   Selected bibliography; hybrid crosses and mitochondrial inheritance.

2. 02

   Characterization of Ten Microsatellite Loci in the Blue Mussel Mytilus edulis

   Delphine Lallias, Ruth Stockdale, Pierre Boudry, Sylvie Lapegue and Andy R. Beaumont · 2009

   Selected bibliography; Journal of Shellfish Research 28(3):547–551 (2009). Title, author block and abstract checked in the institutional repository indexed PDF; full PDF access was unavailable.

Family, evolution & connections

Taxonomic classification

A hierarchy of classified groups, not a chain of direct ancestors.

Source note: Ranks follow the MarLIN species review.

1. classBivalvia
2. orderMytilida
3. familyMytilidae
4. speciesMytilus edulis

References

Sources supporting this profile. Linked pages have their own scope and editorial standards.

1. Species biology reviewCommon mussel (Mytilus edulis)Research access: 2026-10-06
2. Institutional repository PDFCharacterization of Ten Microsatellite Loci in the Blue Mussel Mytilus edulisResearch access: 2026-10-06
3. PubMed abstractDisruption of doubly uniparental inheritance of mitochondrial DNA in hybrid mussels (Mytilus edulis x M.galloprovincialis)Research access: 2026-10-06

Image credits

A black silhouette of a mussel shell with an irregular fan of fine byssus threads extending at one side.

Attributed silhouette labelled Mytilus edulis in the individual source record; retained whole raster shows an outline, without colour, exact locality or diagnostic detail.