Which one of the following is a marine fish:
a. Rohu
b. Hilsa
c. Catla
d. Common Carp
The answer is option (b) Hilsa.
Explanation: Rohu, Catla, and Common carp are freshwater fish. Marine fish are those fish which are found in oceans and seas. E.g. Hilsa, a marine fish also known as Bengal llish.