If you're concerned about the myriad environmental problem's facing the world's oceans, then one place to start is watching what you eat from the deep blue. The Monterey Bay Aquarium's Seafood Watch is a great program designed to raise consumer awareness about the importance of buying seafood from sustainable sources. The have handy pocket guides recommending which seafodd to buy or avoid. The guides cover the following U.S. regions and are available in Spanish (.pdf so right mouseclick the links below):