Atlantic herring is wild-caught in the cold waters of the Gulf of St. Lawrence in Canada and in the Gulf of Maine, as well as off of Eastern Iceland. This species of fish is the most abundant fish on the planet and can be found on both sides of the North Atlantic Ocean. Atlantic herring is mostly harvested by purse seiners and mid-water trawlers. This bright-silvery small fish has an off-white firm flesh, rich in omega-3 fatty acids. Pickled herring is a delicacy in many cuisines around the globe, especially in Scandinavian countries.