Tuna, also known as tuna and tuna, is a highly transoceanic migratory fish, which is found in all oceans of the world. Tuna, because of its vigorous activity and strong vitality, must swim fast all the time to maintain its body supply. In addition, it only moves in the depths of the ocean, so its meat is tender and delicious, and it is not polluted by the environment. It is a rare healthy food for modern people.

In biological classification, tuna in a broad sense refers to 30 species of fish in Sparidae, Swordfish and Swordfish. There are six kinds of tuna sashimi, including bluefin tuna, Ma Su tuna, bigeye tuna, yellowfin tuna, albacore tuna and bonito. The quality from high to low is bluefin tuna, Ma Su tuna, bigeye tuna and yellowfin tuna. Bluefin tuna and Ma Su tuna have low production and very high prices. Common tuna sashimi is made of bigeye tuna and yellowfin tuna.

Tuna has high nutritional value, and its nutritional components include protein, lipids, sugars, calcium, phosphorus, iron, sodium, potassium, magnesium, zinc, copper, vitamin A, vitamin E, vitamin D and cholesterol. Compared with common fish and meat, tuna has the characteristics of low fat, low calorie and high protein, which can promote the growth and development of teenagers and help women lose weight and beauty. In addition, because tuna lives in the deep sea with high salinity, tuna is definitely a pollution-free green and healthy food.