Fish should be introduced after the age of one year. Fish is an important part of your diet; it is super-packed with nutrients which are essentially required for healthy growth and development of body.
Researchers after looking at trials of 112,059 people concluded that "increasing long-chain omega 3 provides little if any benefit on most outcomes". People should invest more in vegetables than fish oil supplements.
To prevent species of fish from being wiped out, campaigners are working towards educating consumers on sustainable ways of eating fish. If you're living on the west coast of India, Mackerel needs to be left alone from the months of June to September.