Question

Dorsal and ventral fins are continuous with caudal fin in
A) Lungfishes
B) Eel
C) Sea Horse
D) Both A and B

Answer 1

Hint:The dorsal fin and flukes are composed of connective tissue and not bone. Dorsal fins are single and are located at the back of the body fish.

Complete answer:
Let's discuss the option and find the correct answer.
>Option A: Modern lungfish have paired pectoral and pelvic fins with an elongate body. In this a single unpaired caudal fin replacing the dorsal, caudal and anal fins of most fishes.
>Option B: In Eel, no pelvic fins are seen and they even lack pectoral fins. The dorsal fins are fused with caudal fins which form a single ribbon running along the length of the fish.
>Option C: In sea horse, dorsal fin is seen and they even have pectoral fins. But the dorsal fin is not found continuous with the ventral fin. Therefore, this is the incorrect option.
>Option D: As both option A and B are correct, therefore, this is the correct option.

Thus, the correct answer is option (D) Both A and B.

Note: The skeletal system system of the fish forms the framework of the body and is composed of tissues and bones. There are two types of skeletons,
>Exoskeleton - Outer shell of the fish
>Endoskeleton - Inner shell of the fish