A bottom feeder is an aquatic animal that feeds on or near the bottom of a body of water. The body of water could be the ocean, a lake, a river, or an aquarium. "Bottom feeder" is a general term which is used particularly in the context of aquariums. More specific terms for bottom feeders are: groundfish, demersal fish and benthos. Bottom feeding fish include flatfish, eels, ling cod, haddock, bass, grouper, bream and some species of catfish and shark. Bottom feeding invertebrates include shellfish, crabs, crayfish, sea anemones, starfish, snails, bristleworms and sea cucumbers.

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