(a) Dorsal fin

Function of the dorsal fin - To stabilize the animal against rolling and to assist in sudden turns.

(b) Caudal fin

Function of caudal fin - In most fish, caudal or tail fin is the main propelling fin and helps in changing direction.

(c) Anal fin

Function of anal fin: To stabilize the fish while swimming.

(d) pelvic fin

Function of Pelvic fin: To balance the fish and prevent it from rolling from side to side.