What is the function of operculum in fishes ?

You are provided with a picture of a fish given below : (i) Name four parts labelled as a,b,c and d. (ii)What is the function of part labelled as 'b'?

What is the role of air bladder in fishes ?

What is the role of swim bladder in fishes.

What is the importance of fins in fish?

What is the meaning of composite fish culture? Outline the significance of composite fish culture.

What is the popular name of Trygon fish ?

Give the answer of following questions by observatios from given figures: (i). Which fish has air bladder? (ii) which fish is known as saw fish? (iii) which fish is cartilaginous fish? (iv). Which animal is ectoparasite on true fishes? (v) Which fish has paired fins? (vi) which fishh has body skeleton? (vii) Which fish has 4-pairs of gills? (viii) Whch fis has operculum? (ix) Which fishes are viviparous? (x) Which fish lives in fresh water?

Fishes are

What are the methods of capturing fish?

What is use of swim bladder of bony fishes ?