It includes true bony fishes.There include 20,000 living species,both freshwater and marine. Some of the freshwater forms are the carp,perch,bass, trout,catfish,sucker. Where as marine fishes are the tarpon,meckerel,tuna,sailfish,barracula,flyingfish. The classification of class osteichthyes by A.S.ROMER(1966) . The two subclass include sarcopterygii and Actionpterygii.The subclass Teleostei include 17,000 species the singke largest group of living vertebrates.
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