Because tuna moves at high speeds body temperature rises.

Tuna meat is a bit like chicken, with a sour flavor. Tuna is best eaten raw, "chilled" level, because the selection of materials is the highest, the surface of the natural red or dark red, the surface of the feeling of oil, fish elasticity, eaten raw in the mouth smooth and have a special flavor Oh.

Because tuna meat contains a lot of fat, stored at room temperature will appear fat autolysis and oxidation phenomenon, so once caught on the shore must be immediately slaughtered and frozen.

Ultra-low-temperature tuna is a short treatment of tuna fishing, in the return transportation, warehousing, distribution and terminal storage of all aspects of the tuna are in -55 ℃ deep freeze state.

After thawing is generally red or dark red (some have white stripes), the intensity of the color varies greatly, but the luster is natural . After thawing, you can smell the tuna's unique flavor, tender and crisp meat, flexible, melt in your mouth, ultra-low-temperature tuna retains the tuna's original high protein, high unsaturated fatty acids and trace elements and other nutrients.

Tuna:

Tuna is a species that can maintain its body temperature higher than that of the surrounding water. They are active and agile predators with smooth, streamlined bodies and are among the fastest swimming pelagic fish.

Tuna can be found in warmer waters, making it a heavily commercially fished fish and a popular fish among fishing activities. Some tuna species, such as the bluefin tuna, are nearing a crisis of extinction due to overfishing by humans.

With the development of modern technology, the use of boats for fishing has also changed. Initially, boats went out on day trips to fish for albacore tuna and usually had to return home at night.

This was due to the fact that the fish caught could not be kept fresh without ice. Modern boats catching tuna have a variety of refrigeration systems that allow them to stay for more than a month at a time. This capability has greatly expanded the fleet's range, allowing people to travel hundreds of kilometers at sea in search of tuna.