No regard is shown for the welfare of the fish by commercial fishing people. Those caught in drift nets become entangled by their gills and unable to breathe and will suffocate unless the nets are retrieved quickly. Other sea creatures. Commercial fishing is mostly undertaken with nets, either trawled behind boats or left to drift in the water. These indiscriminate methods also catch many unwanted fish species, which are usually thrown back dead.
Commercial fishing causes pollution from fuel and the miles of gill-nets left trailing in the sea.
Fishing is a very inefficient method of food farming as it wastes an enormous amount of energy and creates a high level of pollution in relation to the catch.