Jessica McConnell, 26, of Silver Spring, Md., tries to identify halibut, red snapper and salmon at a dinner hosted by Oceana and the National Aquarium in Washington, D.C.
Thierry Chopin from the University of New Brunswick examines a raft that holds strings of seaweed. The seaweed grows around pens of farmed salmon and soaks up some of the nutrients that would otherwise pollute the Bay of Fundy.
A young parishioner carries plates filled with fried fish and potatoes to a table during a Lenten Friday fish fry at St. Frances Cabrini Catholic Church in Littleton, Colo., in 2009.
Swordfish from Canada are marked with a label from the Marine Stewardship Council at a Whole Foods in Washington, D.C. The MSC says its label means the fish were caught by a sustainable fishery, but critics says it's not always so clear.