About the introduction of tuna

Tuna is a fish that we often hear about but don't know very well, but in fact, it is a marine organism with high nutritional value, and its products are very popular in the market.

Tuna is also known as tuna. Hong Kong people originally used their English pronunciation as tuna and it is still used today. Macau, as the subwintering fish in Portuguese, is a marine creature of the mackerel family, most of which belong to the genus Tuna.

Tuna ( pinyin: wěi , also known as tuna , tuna ) is a marine creature of the family Mackerel , mostly found in the genus Tuna. The flesh of tuna is red because it contains a lot of myoglobin in its muscles. Some tuna, such as bluefin tuna (T. thynnus, T. maccoyii, T. orientalis), can harness the metabolism of swimming muscles; Make the temperature of blood in the body higher than the temperature of the water outside. This physiological function allows tuna to adapt to a large range of water temperatures, allowing it to survive in cooler waters.

It is found in the Indian Ocean, the central Pacific Ocean and the central Atlantic Ocean and is a tropical and subtropical oceanic fish. Tuna swims a long way, and in the past it has been found swimming from California in the coastal waters of Japan, and it swims fast, reaching an instantaneous speed of up to 160 kilometers per hour, with an average speed of about 60-80 kilometers per hour.

There are 8 species of tuna, most of which are huge, up to 3.5 m long and weigh between 600 and 700 kg, while the smaller ones weigh only 3 kg. Tuna is highly reproductive, with a 50 kg female laying up to 5 million eggs per year. Tuna is a popular seafood with high economic value. National policies, activities and overfishing by fishermen have threatened their populations, notably bluefin tuna. As a result, international control of tuna fishing has begun, with considerable success.