Haddock is a saltwater fish that is an extremely rich source of protein and packed full of essential vitamins and minerals. A great source of Omega 3, vitamin B6 and B12, magnesium, niacin, phosphorus, and selenium - all of which play an important role in cell and food metabolism and the formation of red blood cells. Because of its high content of minerals, haddock helps support heart health, bone strength and your immune system. The addition of magnesium, potassium, zinc and iron also help strengthen and improve the health of your body.