#marine_mussel__mytilid  marine bivalve mollusk having a dark elongated shell; live attached to solid objects especially in intertidal zones
  supertype:  mussel  marine or freshwater bivalve mollusk that lives attached to rocks etc.
  member of:  family_Mytilidae
  subtype:  edible_mussel__Mytilus_edulis  dark-shelled edible mussel that lives attached to rocks

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