#clam  burrowing marine mollusk living on sand or mud
  supertype:  bivalve__lamellibranch  marine or freshwater mollusks having a soft body with platelike gills enclosed within two shells hinged together
  part:  clam.shellfish
  subtype:  Mya_arenaria__soft-shell_clam__steamer__steamerclam__long-neck_clam  an edible clam with thin oval-shaped shell found in coastal regions of the United States and Europe
  subtype:  Venus_mercenaria__quahog__quahaug__hard-shell_clam__round_clam__roundclam__Mercenaria_mercenaria  an edible American clam
     subtype:  littleneck_clam__littleneck  a young quahog suitable to be eaten raw
     subtype:  cherrystone_clam__cherrystoneclam__cherrystone  a half-grown quahog
  subtype:  geoduck  a large edible clam found burrowing deeply in sandy mud along the Pacific coast of North America; weighs up to six pounds; has siphons that can extend to several feet and cannot be withdrawn into the shell
  subtype:  razor_clam__razorclam__jackknife_clam__jackknifeclam__knife-handle__knifehandle  marine clam having a long narrow curved thin shell
  subtype:  giant_clam__giantclam__Tridacna_gigas  giant clam inhabiting reefs in the South Pacific weighing up to 500' pounds
  subtype:  shipworm__teredinid  wormlike marine bivalve that bores into wooden piers and ships by means of drill-like shells
     subtype:  teredo  typical shipworm
     subtype:  giant_northwest_shipworm__giantnorthwestshipworm__Bankia_setaceae  giant shipworm of the Pacific coast of North America

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