Fishing is not sport. The fish are not willing participants, they're victims. Science has shown that fish are sentient, they suffer fear and pain. Many of the fish who are released die as a result of the injury and trauma inflicted on them. Fishing isn't sport, it's animal abuse. 

All of the nutrients we need to thrive can be obtained more healthfully, humanely, and environmentally responsibly from plant sources. Needlessly harming animals for food or 'fun' or any other reason is animal abuse: plain, cruel, and unjustifiable.