Other good fish sources of omega 3 fatty acids include mackerel, lake trout, herring, sardines and albacore tuna.

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Albacore tuna is higher in mercury than canned light tuna because canned tuna is largely younger, smaller fish that haven't absorbed as much mercury.

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The agency warns, however, that pregnant and breast-feeding women shouldn't eat swordfish, tilefish, shark, or king mackerel and should limit consumption of white, albacore tuna, a commonly canned variety.

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From the tuna filet mignon to mustard-crusted albacore, tuna's a healthy choice, with only 1 gram of fat per 3- ounce serving.

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