Question

Which of the following animals is a fish?

• A. Dogfish
• B. Starfish
• C. Silverfish
• D. Jellyfish

Answer 1

The correct option is A Dogfish

Starfish is an echinoderm. Silverfish is an arthropod. Jellyfish belong to the phylum Coelenterata. Dogfish are true fishes that belong to Pisces. They have the following characteristics of fishes:

1) They have a streamlined body, fins, and a tail.

2) Their skeletons are made entirely of cartilage,

3) They lay eggs,

4) They breathe through gills.

5) They are cold-blooded.

6) They have two-chambered hearts.

Thus, the correct answer is option A.