2. Freshwater Coho Salmon (farmed in tank systems, from the U.S.)
Freshwater coho salmon is the first—and only—farmed salmon to get a Super Green rating. Most other farmed salmon still falls on Monterey Bay Aquarium's Seafood Watch "avoid" list for a few reasons. The majority of farms use open net pens in the ocean, where crowded salmon are easily infected with parasites, may be treated with antibiotics and can spread disease to wild fish (one reason Alaska has banned salmon farms). Also, it can take as much as three pounds of wild fish to raise one pound of salmon. An increasing number of farms, however, use closed freshwater pens (aka recirculating aquaculture systems), reducing the adverse environmental impacts. Look for "land-based" or "tank-based" at the fish counter. All salmon is a healthy source of omega-3s—one 3-ounce serving delivers 700 to 1,800 milligrams. Enjoy a Cajun-grilled salmon fillet on a crisp toasted bun with creamy avocado spread, in this recipe for Blackened Salmon Sandwich.