![]() Bony fish are also unusual in possessing taste cells in the head and trunk region of the body that allow them to detect extremely small concentrations of molecules in the water.Īll bony fishes, like the cartilaginous fishes, use gills to breathe. Unlike sharks, some bony fish depend on their eyesight to locate prey. Like sharks, bony fishes have a lateral line system that detects vibrations in water. The skin of bony fishes is often covered in overlapping scales, and glands in the skin secrete mucus that reduces drag when swimming and aids the fish in osmoregulation. This characteristic has only reverted in a few groups of Osteichthyes, such as sturgeons and paddlefish, which have primarily cartilaginous skeletons. ![]() Nearly all bony fishes have an ossified skeleton with specialized bone cells (osteocytes) that produce and maintain a calcium phosphate matrix. The vast majority of present-day fishes belong to this group, which consists of approximately 30,000 species, making it the largest class of vertebrates in existence today. Members of the clade Osteichthyes, or bony fishes, are characterized by a bony skeleton. ![]() Most species are marine and live on the sea floor, with nearly a worldwide distribution. Like sharks, rays and skates have a cartilaginous skeleton.
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