Not all fish may be good for you, according to the Reebok Aerobic Information Bureau.

Fish is a low-fat, low-sodium food, but fat supplies half the calories in most deep-fried brands found in your supermarket's freezer.A serving of deep-fried frozen fish contains 350 to 500 milligrams of sodium. Instead, try broiling fresh fish to preserve its low-fat, low-sodium benefits.