Most fish eat smaller fish. So farmed fish are fed fishfood which is made from caught wild fish. It takes something like 5kg of anchovies to make 1kg of farmed

Most fish eat smaller fish. So farmed fish are fed fishfood which is made from caught wild fish. It takes something like 5kg of anchovies to make 1kg of farmed salmon. Sustainable fishing means taking less from the sea, adhering to quotas, not continuing to catch species at risk, and setting up sanctuaries where fish stocks can replenish.