Question

Mention some common marine fishes of India. Write a short note on how the marine fishes are caught. How large schools of fishes are located in open sea.

Answer 1

Some of the marine fishes found in India are silver pomphret, Indian mackerel, yellowfin tuna, etc. The fishes are caught by using large trawl nets.

Large school of fishes are located in the open sea by using echo sounders and satellite imaging systems that send a wave of sound inside the water which when strikes any objects they return back and are received by the same device. This information then received is used to give input to certain computer program which generate the a replicated image of the object. The calculations are made depending upon the speed of the sound in water or which ever medium the sound wave was projected into.