Demersal fish
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Demersal fish, also known as groundfish, live and feed on or near the bottom of seas or lakes. They occupy the sea floors and lake beds, which usually consist of mud, sand, gravel or rocks. In coastal
Bluespotted ribbontail ray resting on the seafloor
Rhinogobius flumineus swim on the beds of rivers
Benthic flatfish and benthopelagic cod on a shore – Jan van Kessel senior, 1626–1679
Flounder have both eyes on one side of their head
Halibut
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Halibut is the common name for three species of flatfish in the family of right-eye flounders. In some regions, and less commonly, other species of large flatfish are also referred to as halibut.
Demersal fish
…and dragonets. Flatfish are an order of ray-finned benthic fishes which lie flat on the ocean floor. Examples are flounder, sole, turbot, plaice, and halibut. The adult fish of many species have both eyes on one side of the head. When the fish hatches, one eye is located on each side of its head. But as the…
Atlantic halibut
Fishermen in Seward, Alaska, with a fresh catch of halibut
Halibut caught off the coast of Raspberry Island, Alaska, in 2007: The two fish being held up are 18 to 23 kg (40 to 50 lb)
Halibut tend to be a mottled dark brown on their upward-facing side and white on their underside