Skeleton is made entirely of cartilage in
(a) Sharks
(b) Tuna
(c) Rohu
(d) None of these
Answer- (a)
Solution:
The skeleton of cartilaginous fish is made up of cartilage. They are also called as Osteichthyes
e.g., Sharks whereas Tuna and Rohu are bony fishes with a bony structure. They are also called as Chondrichthyes
The correct answer is- a)- Sharks