Bony fish are characterized by a relatively stable pattern of cranial bones, rooted, medial insertion of
Early … See more

Traditionally, Osteichthyes was considered a class, recognised on the presence of a swim bladder, only three pairs of gill arches hidden behind a bony operculum, and a predominantly bony skeleton. Under this classificatio… See more

All bony fish possess gills. For the majority this is their sole or main means of respiration. Lungfish and other osteichthyan species are capable of respiration through lungs or vascularized swim bladders. Other species ca… See more