Herring fillets are pieces of fish taken from the herring, a small, oily fish commonly found in the North Atlantic and North Pacific oceans. These fillets are often preserved through methods like pickling, smoking, or canning, making them a popular choice in various cuisines around the world. Rich in omega-3 fatty acids, herring fillets are not only flavorful but also nutritious. They can be enjoyed in salads, sandwiches, or as part of traditional dishes in countries like Germany and Scandinavia, where they are often served with potatoes or bread.