lump·fish 
(l
ŭmp
f
ĭsh
′)
n. pl. lumpfish or
lump·fishes Any of various fishes of the family Cyclopteridae, especially Cyclopterus lumpus of North Atlantic waters, having a stout knobby body with pelvic fins united to form a suction disk, and producing roe that is used for caviar. Also called lumpsucker.
[Obsolete lump (perhaps from Dutch lomp, burbot, eelpout, lumpfish; probably akin to Dutch lomp, sabot, wooden shoe (since the fish have a plump shape and blunt heads) and English LUMP1) + FISH.]