This is an exaggeration, which means that the body temperature of tuna is relatively high. "Hunting tuna to prevent burns" may be a good idea for people who want to protect tuna, warning hunters not to catch tuna indiscriminately.

The swimming speed of tuna is about 30 kilometers per hour to 50 kilometers per hour, with a maximum speed of 160 kilometers per hour, which is faster than the fastest cheetah on land. Its body temperature is between 33 and 35 degrees, which is higher than the general water temperature. This is because when tuna swims, it always opens its mouth and opens its gill cover at the same time, allowing water to pass through the gills for oxygen respiration.

Tuna does not rest even at night. This tireless and fast swimming requires strong muscle contraction and high-intensity metabolism to keep the tuna's blood at a relatively high temperature. .

In addition, tuna has a developed skin vascular system connected to the muscles and skin on both sides of the spine, forming a large number of vascular networks. There is also blood flow in these vascular networks, indicating that the metabolism of these parts is particularly strong. , therefore, the flesh of this part of the tuna is purple-red instead of white. In addition, it also has the same vascular network in its liver.

The high-intensity metabolism keeps the blood of tuna at a relatively high temperature, so it can also be regarded as a "hot-blooded animal".