What is the difference between bony fishes and cartilaginous fishes?
Answers
cartilaginous fishes are the fishes whose skeleton is made of cartilage
1. Cartilaginous fishes are mostly marine.
2. The mouth of cartilaginous fishes is ventral.
3. The external nares are ventral.
4. The scales of cartilaginous fishes are Placoid.
5. In cartilaginous fishes, operculum is absent except chimaera.
6. Caudal fins are heterocercal (asymmetrical).
7. In cartilaginous fishes, cloaca are present except chimaera.
8. Endoskeleton is cartilaginous.
9. Sprial valve is present in the intestine of cartilaginous fishes.
10. Cartilaginous fishes have 5-7 pairs of gills.
11. Swimbladder (air bladder) is absent in cartilaginous fishes.
12. Excretory matter of cartilaginous fishes is Urea.
Difference # Bony Fishes:
1. Bony fishes are mostly marine and fresh water.
2. The mouth of bony fishes is anterior.
3. The external nares are dorsal.
4. The scales of bony fishes are genoid, cycloid and ctenoid.
5. In bony fishes, operculum is present
6. Caudal fins are usually homocercal (symmetrical).
7. In bony fishes, cloaca is absent.
8. Endoskeleton is partly or wholly bony.
9. Sprial valve is usually absent in intestine of bony fishes.
10. Bony fishes have 4 pairs of gills.
11. Swimbladder (air bladder) is present in bony fishes.
12. Excretory matter of bony fishes is ammonia.