Source : Webster's Revised Unabridged Dictionary (1913)

Lumpfish \Lump"fish`\, n. [From {Lump}, on account of its
   bulkiness: cf. G. & D. lump, F. lompe.] (Zo["o]l.)
   A large, thick, clumsy, marine fish ({Cyclopterus lumpus}) of
   Europe and America. The color is usually translucent sea
   green, sometimes purplish. It has a dorsal row of spiny
   tubercles, and three rows on each side, but has no scales.
   The ventral fins unite and form a ventral sucker for adhesion
   to stones and seaweeds. Called also {lumpsucker},
   {cock-paddle}, {sea owl}.

Source : WordNet®

lumpfish
     n : clumsy soft thick-bodied northern Atlantic fish with pelvic
         fins fused into a sucker; edible roe used for caviar
         [syn: {Cyclopterus lumpus}]
     [also: {lumpfishes} (pl)]