Difference between Chondrichthyes and Osteichthyes are stated below:
Chondrichithyes
1. Mostly marine with a heterocereal tail.
2. Endoskeleton cartilagenous.
ADVERTISEMENTS:
3. Skin with placoud scale.
4. Gills 5-7 pairs without opercula.
5. No air badder or lungs.
Osteichthyes
ADVERTISEMENTS:
1. Developed bony fish with homocereal tail.
2. Endoskeleton bony.
3. Skin with mucosglands, ganoid, cycloid ot ctenoid scales.
4. Gills four pairs with opercula.
ADVERTISEMENTS:
5. Swim bladder present.