Give the economy of fishes.

Discuss the economics of fish culture.

Give the term for the newly-hatched young ones of fishes.

Give the reasons for the following statements: Pickles ,meat and fish are preserved by salting.

Give the reason for the following statements: Cartilage fishes retain large amount of urea in their body fluids.

Give examples of bony fishes.

Name the respiratory organ of fishes.

Give two examples of marine food fishes.

Define catadromous migration of fishes. Give one example.