Tuna steak on lava stone

Tuna is an oily fish of the family of marine Thunnidae and the order of Perciformes. The tuna is also called the "pig of the sea", in fact, do not throw anything away, except for the blood. A second cut of the meat is more or less oily, but always rich in protein. The genus Thunnus, commonly known as Tuna, includes 8 species of large pelagic fish belonging to the family Scombridae. The tuna have an elongated body and hydrodynamic ovaloid, rather compressed at the sides. The dorsal and anal are high and sturdy. After the dorsal and anal fins are some stabilizer. It is characterized by bluish back, sides and belly silvery gray. The dimensions are high, ranging from about 1 m to 4.5 m Thunnus atlanticus Thunnus thynnus. The flesh of tuna ranges from very light pink (almost white) to reddish brown, depending on the variety, until the red color of the flesh. The tuna steak may have a darker brown area, which is edible, and has a much stronger flavor. Finds its greatest use in Japanese cuisine, and dishes like Sushi, Sashimi and Dashi and its consumer is a species at risk of extinction. There are various species among the most widespread are here: bluefin tuna, albacore tuna, yellow-fin tuna. It can be eaten raw, cooked or canned. In the choice of fresh tuna canned tuna, one must have some adroitness.