Hooks, nylon nets, boats, motors, cable, gas to run the boats, knives and machines to process the fish, the cans and bottles and packaging for the fish, the planes and railroad cars, the roads, the tires..... ALL MINED.  Next time you get an injection or use electricity or refrigeration or sanitizing products or take antibiotics, ask yourself if mines are necessary for survival.  They are. 

The mine and the fish are not mutually exclusive.