groundfish

WORDNET DICTIONARY

groundfish(n = noun.animal) bottom fish - fish that live on the sea bottom (particularly the commercially important gadoid fish like cod and haddock, or flatfish like flounder);

is a kind of food fish

groundfish, n. sing. & pl.

Fish that live on the sea bottom, especially commercially important gadoid fishes like cod and haddock or flatfish like flounder. [WordNet 1.5]