gaper clam

from The Collaborative International Dictionary of English v.0.48

Gaper \Gap"er\ (g[=a]p"[~e]r), n.
   1. One who gapes.
      [1913 Webster]

   2. (Zool.)
      (a) A European fish. See 4th {Comber}.
      (b) A large edible clam ({Schizoth[ae]rus Nuttalli}), of
          the Pacific coast; -- called also {gaper clam}.
      (c) An East Indian bird of the genus {Cymbirhynchus},
          related to the broadbills.
          [1913 Webster]