Fish farming
Fish farming is the process of growing fish in an artificial environment. The traditional method involves feeding fish waste vegetables, and this is being done in developing countries. Modern fish farming involves feeding processed small wild fish to large carnivorous fish such as salmon, trout, and prawns. However, modern fish farming often relies on fish taken from the water in the developing world to feed the fish being sold in the developing world. Furthermore, fish farms introduce alien species to local environments.