![]() ![]() The word demersal comes from the Latin demergere, which means to sink.ĭemersal fish are bottom feeders. They are not generally found in the deepest waters, such as abyssal depths or on the abyssal plain, but they can be found around seamounts and islands. In coastal waters they are found on or near the continental shelf, and in deep waters they are found on or near the continental slope or along the continental rise. ![]() They occupy the sea floors and lake beds, which usually consist of mud, sand, gravel or rocks. Fish that live and feed on or near the bottom of seas or lakesīluespotted ribbontail ray resting on the seafloor Rhinogobius flumineus swim on the beds of riversĭemersal fish, also known as groundfish, live and feed on or near the bottom of seas or lakes (the demersal zone). More information and pictures of these species are available in the links below. In Sydney we see them on many dives on the sandy floor but they are very well camouflaged. They are widely distributed and many of these species are targeted for fishing such as plaice, halibut, flounders, soles and turbot.įlatfish have been found in the Arctic, Antarctica, the tropics, the temperate, in freshwater, at underwater hydrothermal vents and one species which is being investigated lives at the bottom of the deep Mariana trench. They look altogether alien when you observe up close as both eyes will be on one side of their head. They are very unusual to look at, because as the name suggests, they are completely flat with their eyes on just one side. ![]() This is a large Order of fish with over 700 species worldwide. ![]()
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