Do bony fishes share any common characteristics?
- Osteichthyes has several defining characteristics:
- - bony ridge scales
- - fins supported by scales (vs.rods in Chondrichthyes)
- - skull (including jaws) and shoulder girdle composed largelyof dermal bone, with teeth rooted in jaws
- - gill slits covered by a bony operculum
- - swim bladder or lung for buoyancy and/or gas exchange
- - coiled intestine & ceca