Osteichthyes - a class of fish having a skeleton composed of bone in addition to cartilagebony fish - any fish of the class Osteichthyes Dipnoi, subclass Dipnoi - bony fishes of the southern hemisphere that breathe by a modified air bladder as well as gills; sometimes classified as an order of Crossopterygii class - (biology) a taxonomic group containing one or more orders |