ark shell

Noun
  1. Marine bivalve mollusk having a heavy toothed shell with a deep boat-like inner surface (synset 101965958)
    is a type of: bivalve, lamellibranch, pelecypod - marine or freshwater mollusks having a soft body with platelike gills enclosed within two shells hinged together
    belongs to: arca, genus arca - type genus of the family Arcidae: ark shells and blood clams

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