Source : Webster's Revised Unabridged Dictionary (1913)

Coalfish \Coal"fish`\, n. [Named from the dark color of the
   back.] (Zo["o]l.)
   (a) The pollock; -- called also, {coalsey}, {colemie},
       {colmey}, {coal whiting}, etc. See {Pollock}.
   (b) The beshow or candlefish of Alaska.
   (c) The cobia.