Tilapia are mainly freshwater fish inhabiting shallow streams, ponds, rivers and lakes and less commonly found living in saline water. Tilapia fish primarily have a vegetarian diet, so do not accumulate mercury found in prey.Tilapia is low in saturated fat calories, carbohydrates, and sodium, and are a good protein source. They also contain the micronutrients phosphorus, niacin, selenium, vitamin B12 & potassium.