cod: in a 3 oz serving there's 15 grams of protein, 1 gram of fat, and no carbohydrates. tilapia: in a 3 oz serving there's 21 grams of protein, 1 gram of fat and no carbohydrates. shrimp: in a 3 oz serving there's 17 grams of protein, 1 gram of fat and no carbohydrates.