The Monterey Bay Aquarium has an excellent guide to sustainable fish, web searchable, printable and as Android and iOS apps. They also distinguish between farm

The Monterey Bay Aquarium has an excellent guide to sustainable fish, web searchable, printable and as Android and iOS apps. They also distinguish between farmed, wild caught and if appropriate method of catch: http://www.montereybayaquarium.org/cr/seafoodwatch.Aspx http://www.montereybayaquarium.org/cr/seafoodwatch.Aspx Just because fish is farmed doesn't make it healthy. A high density pen will have high concentrations of everything.