characteristics of bony fish
Answers
fish are colded blood animals
they have gills
Bony fish depend upon their hinged jaw for feeding, a characteristic that distinguishes them from jawless fish, such as lampreys and hagfish. Bony fish also have unique ear plates called otoliths that help their sense of equilibrium and, when fossilized, provide scientists with lots of information about extinct bony fish species.
Bony fish are able to control their buoyancy using swim bladders, which are organs that take in dissolved gases from the water and then inflate or deflate accordingly. Speaking of dissolved gases, bony fish breathe by moving water across their gills using an operculum, which is a trapdoor-like structure that pumps water across the gills so that the fish can breathe without necessarily moving forward in the water.