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Question: Dorsal and ventral fins are continuous with caudal fin in A) Lungfishes B) Eel C) Sea Horse ...

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

Explanation

Solution

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