Is Canned Tuna Environmentally Friendly?

Is Canned Tuna Environmentally Friendly? American Tuna, Fishing Vessel St. Jude, Mind Fish Co., Ocean Naturals, Safe Catch, Wild Planet, Whole Foods are brands that offer tuna we rate as a green Best Choice, yellow Good Alternative or are eco-certified by the Marine Stewardship Council. Is canned tuna bad for the environment? Tuna are a