The Collaborative International Dictionary of English v.0.48:

Sea-ear \Sea"-ear`\ (s[=e]"[=e]r`), n. (Zool.)
   Any species of ear-shaped shells of the genus Haliotis. See
   Abalone.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Ear-shell \Ear"-shell`\, n. (Zo["o]l.)
   any of various large edible marine gastropod mollusks of the
   genus Haliotis, having a flattened ear-shaped shell with a
   pearly interior; -- called also sea-ear. See Abalone.

   Syn: abalone.
        [1913 Webster + WordNet 1.5]

WordNet (r) 3.0 (2006):

sea-ear
    n 1: an abalone found near the Channel Islands [syn: ormer,
         sea-ear, Haliotis tuberculata]