Which one is a true fish?
(a) Jellyfish
(b) Starfish
(c) Dogfish
(d) Silverfish
Answer- (c)
Solution: Jellyfish belongs to phylum Cnideria, silverfish belongs to phylum Arthopoda and starfish belongs to phylum Echinodermata. Dogfish comes under class Chondrichthyes of class Pisces. They have streamlined body with scales and have cartilaginous skeleton.
The correct answer is c)- Dogfish.