It turns out that deep-sea fish has warm blood flowing like a mammal

ByNOAA Fisheries West Coast

The appearance is similar to sunfish but classification is not a fellow of sunfish "Red mambo"The blood is as warm as a human being,American Oceanic and Atmospheric AdministrationNicolas Wegner's research team revealed.

Whole-body endothermy in a mesopelagic fish, the opah, Lampris guttatus
http://www.sciencemag.org/content/348/6236/786

Meet the Comical Opah, the Only Truly Warm - Blooded Fish - Phenomena: Not Exactly Rocket Science
http://phenomena.nationalgeographic.com/2015/05/14/meet-the-comical-opah-the-only-truly-warm-blooded-fish/

Scientists have discovered the first fully warm-blooded fish - The Washington Post
http://www.washingtonpost.com/news/energy-environment/wp/2015/05/14/scientists-have-discovered-the-first-warm-blooded-fish/

The temperature of most fishes is the same as the surrounding water temperature. Some of them, like swordfish, marlin and bashow magazine, temporarily raise the temperature of the eyes and brain when capturing prey, muscle of swimming when you need to swim fast like tuna and sharks Some fish raise the temperature, but there are no fish that can raise the body temperature of the whole body. For example, tuna can dive to a deep place where the water temperature is low, but at that time the temperature of the heart and other organs drops, so it is necessary to return near the sea surface at an appropriate timing to warm the internal organs.

However, as the research team to which Wegner belongs accidentally caught a lot of red squirrel, the ecology and ability of red squirrel which was not known so far was found out. Unlike other fish, red mandarin saw that warm blood flowed like mammals.

ByNOAA Fisheries West Coast

Mr. Wegner noticed red and blue blood vessels are crowded at the part of the ella when dissecting the captured red squirrel. This is because the artery and vein are close to each otherStrange net"Tuna and sharks use the odd net to raise the temperature of the muscles.

The blood warms up, but when the fish breathes, the water temperature deprives the blood of the blood passing through the air. In the case of tuna, because the odd net is in the muscle part for swimming, the heat of warm blood flowing in the vein is transferred to the cold blood flowing through the artery before it is carried to the ella, and the muscle's heat is not lost so much It is possible to swim. However, although the tuna odd net is only in the muscle, the odd nets of the red squirrel are in Ella. Whereas tuna made sure not to cool the muscles, the red squirrel did not cool down Ella itself, so that the body temperature of the whole body is not lowered as much as possible. Moreover, by covering with thick fat, it is making a body that makes Era and the pectoralis muscle which produces the most heat cooler.

ByNOAA Fisheries West Coast

In fact, Mr. Wegner's research team caught a red squirrel, put a small thermometer inside the body and returned it to the sea again and analyzed, the brains and muscles of red mambo were kept warm, especially because the heart was kept warm Mr. Wegner says it can stay in the deep sea. Although you can not keep your body temperature as high as mammals and birds, you can see that the temperature maintenance ability of red leaves is high compared to other fish.

ByNOAA Fisheries West Coast

In addition, Mr. Wegner seemed to think that swimming was slow as red mambo was deep-sea fish, but it is an active predator who swims very fast in spite of a somewhat comical appearance, I know that it has moved 1000 kilometers.

ByNOAA Fisheries West Coast