Delaware only offers Atlantic Mackerel that is sustainably and responsibly harvested under extremely stringent U.S. regulations. Found in both tropical and temperate waters, this Omega-3-rich fish is packed with vitamins and minerals and is also high in protein and essential amino acids. Mackerel is enjoyed in a variety of dishes throughout the world. Grilled mackerel is a favorite; however, mackerel can also be poached, broiled, baked and pan-fried. You can even find recipes for Mackerel Ceviche.