The Collaborative International Dictionary of English v.0.48:

amberfish \am"ber*fish`\, Amber fish \Am"ber
fish`\([a^]m"b[~e]r*f[i^]sh`). (Zool.)
   Any of several amber to coppery fork-tailed warm-water
   carangid fishes of the genus Seriola, especially a large
   vigorous sport fish of the southern Atlantic coast (Seriola
   Dumerili). It is also called the amberjack.

   Note: Seriola Carolinensis was the species name given in
         the 1890 Webster: same fish or different?

   Syn: amberjack
        [1913 Webster + WordNet 1.5 +PJC]

WordNet (r) 3.0 (2006):

amberfish
    n 1: any of several amber to coppery fork-tailed warm-water
         carangid fishes [syn: amberjack, amberfish]