The Collaborative International Dictionary of English v.0.48:

Crabeater \Crab"eat`er\ (kr[a^]b"[=e]t`[~e]r), n. (Zool.)
   (a) The cobia.
   (b) An etheostomoid fish of the southern United States
       (Hadropterus nigrofasciatus).
   (c) A small European heron (Ardea minuta, and other allied
       species).
       [1913 Webster]