The Collaborative International Dictionary of English v.0.48:

Redfish \Red"fish`\ (r[e^]d"f[i^]sh`), n. (Zool.)
   (a) The blueback salmon of the North Pacific; -- called also
       nerka. See Blueback
   (b) .
   (b) The rosefish.
   (c) A large California labroid food fish (Trochocopus
       pulcher); -- called also fathead.
   (d) The red bass, red drum, or drumfish. See the Note under
       Drumfish.
       [1913 Webster]