A demersal fish is a fish or other aquatic animal that feeds on or near the bottom of the ocean in the demersal zone. They are also known as bottom feeders or groundfish, and may be contrasted with pelagic fish. Some species of catfish, such as the members of the genus Corydoras, are demersal fish. Other examples include cod, haddock, whiting, halibut, perch, snapper, eel, grouper, bream, bass, flounder, plaice, sole, and demersal shark. Compared to pelagic fish, they contain little oil (1 to 4%).
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