Question

Which of the following is a true fish?

• A. Flying fish
• B. Cuttle fish
• C. Jelly fish
• D. Silver fish

Answer 1

Answer: (A)

The Exocoetus is the 'flying fish' and is in the family of marine fishes of class Actinopterygii. They are true fishes as they have streamlined body with scales and respire through gills.

Cuttle fish are the mollusc of the order Sepiida, belonging to the class Cephalopoda e.g., squid, octopods.
Silver fish or Lepisma is a small, wingless insect in the order Thysanura.
Jelly fish are major non-polyp forms in the phylum Cnidaria.

Thus, the correct answer is option A.