Why don't the fish in the lake freeze to death in winter?

The weather in winter is very cold, especially in the north. The temperature below zero can freeze some animals and even people to death, and a thick layer of ice will form on the water surface in winter. Since the water surface will be cold enough to freeze in winter, why don't the fish in the water freeze to death? There will be no ice in the deep water

In winter, there will be a layer of ice on the water surface, and the ice on many water surfaces is so thick that people can walk or play on the ice without falling. In many areas, the temperature in winter has reached below zero. Why don't the fish in the lake freeze to death?

Although the winter weather is very cold, the ice on the lake can carry people and goods, but the depth of the lake ice is far less than that of the lake. Although the lake is frozen, this does not prevent fish from moving under the ice. Therefore, after the lake freezes, there will still be fish moving in the lake to live a normal life. Don't fish feel cold under this thick ice layer? In such a cold winter, will fish freeze to death if they live under the ice? Ice is the protective layer of fish

In fact, a thick layer of ice on the lake will not bring cold to fish, but protect their normal life. Under the protection of ice, fish can survive in the lake without freezing to death.

In the cold winter, with the drop of temperature, the water in the lake has changed from liquid to solid. However, the change of water in the lake obeys the laws of nature. Although the water will freeze, the frozen water in the lake is closest to the outside world. Even if the weather is cold, the frozen area in the lake is only the surface layer of the lake, and the thick ice layer on the lake is enough to ensure that the water in the lake will not freeze again, and the ice surface will not spread downward. Therefore, the ice on the lake is actually a protective layer for fish to survive, which provides the basic conditions for fish to live normally in water. Keep the temperature under the ice

When the lake freezes, the lake below the ice can keep a certain temperature and will not be frozen any more. The lake under the ice is kept at a constant temperature of 4 degrees, and this temperature will not freeze to death for fish.

The water under the ice keeps a constant temperature of 4 degrees Celsius, so far there is no reasonable explanation. Perhaps this is the magic of nature. Fish is not warm-blooded animals, and its body temperature will change with the change of environment, so the temperature maintained by fish itself has a great relationship with the water temperature. The water temperature of 4 degrees is enough for fish living in water to survive and maintain a normal life, and the fish will not freeze to death again, so even in cold winter, we will not see the fish freeze to death. The lake will only freeze when it is below zero degrees Celsius, so the temperature in the lake can ensure the survival of fish when it is not completely frozen.

This is why the fish in the lake will not freeze to death in winter. There are many magical things in nature, and it is also in line with the laws of nature that fish can survive in winter.