Try Royal Fillets of Mackerel in Olive Oil! Treat yourself to gourmet quality skinless and boneless North Atlantic mackerel in pure, buttery olive oil. Extraordinary, light taste and moist texture – truly unique. Only three ingredients. The perfect tuna substitute. Sustainably wild-caught, Non-GMO Project Verified, gluten-free, kosher-certified, hand-packed. Delicious in “tuna-style” sandwiches, salads, pasta or casserole dishes, fish burgers, or right out of the can on a cracker!