Herring is a type of oily fish. It is a small, saltwater fish found in the Atlantic, Pacific, and Arctic oceans. Herring is known for its high oil content, which gives it a rich, flavorful taste and a tender, moist texture. Oily fish like herring are also an excellent source of omega-3 fatty acids, which are important for maintaining good health. Herring is often cured or smoked and is commonly eaten in Scandinavian and Northern European cuisine. It can be served as a main dish, in sandwiches, or as a topping for crackers or bread.