BONE FISH any fish that has a mainly calcified bone structure and few cartilaginous pieces, instead of having a traditional complete cartilaginous structure. Scientifically they are called osteichthyes osteichthyes, (from the Greek osteon, "bone", and ichthus, "fish") commonly known as bony fish. They are gnathostomous vertebrates that include all fish endowed with internal bony skeleton, . Together with the chondrichthyes (cartilaginous fish), they form the two large groups comprising animals commonly called "fish", although there is a third group, that of jawless fish (lampreys and mixines), with very few current representatives.
