Source : Webster's Revised Unabridged Dictionary (1913)

Redfish \Red"fish`\ (r[e^]d"f[i^]sh`), n. (Zo["o]l.)
   (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}.

Source : WordNet®

redfish
     n 1: North Atlantic rockfish [syn: {rosefish}, {ocean perch}]
     2: large edible fish found off coast of United States from
        Massachusetts to Mexico [syn: {red drum}, {channel bass},
        {Sciaenops ocellatus}]
     3: male salmon that has recently spawned
     [also: {redfishes} (pl)]