The most exquisite and tender part of Bluefin Tuna is a soft and delicate red tuna, marinated in olive oil. Bluefin Tuna Belly, called the Ventresca in Italian, covers the fish's hip and belly and has a smooth and delicate taste. This species of Tuna, known as Thunnus thynnus, is rich in proteins and Omega3 with an incredible nutritional value.