fish, shrimp, clams, scallops and lobster are all excellent low-fat sources of protein - but as with all animal-protein sources, the trade off is higher levels of cholesterol.
a 4 oz salmon filet delivers 19 grams of protein and 2 grams of fat. This is about the size of a deck of cards.
a 6 oz chicken breast will get you 51 grams of protein and a bit more fat than the fish... but that depends on the method of cooking for anything you eat.
How many grams per day are you shooting for?
The daily recommendation for protein intake is .63 to .77 grams per pound of body weight (daily) for someone engaged in Body building training. Source: http://www.eatright.org/Public/content.aspx?id=7086&terms=recommended+protein+int ake