Are there any fish that are not afraid of the heat? Are baby fish afraid of heat

There are a few fish in the world, and they live happily in the hot water.

There's a true story: it was in 1936 that the American navigator Rip sailed to the North Pacific Ocean, when suddenly, an unusual gust of wind and huge waves rushed to the side of the ship, knocking Rip overboard. Rep was pushed by the waves to the island of Idu Puru in the Kuril Islands, and his life was saved, carrying a large folding teacup with him.

At this time, he felt pain all over his body, and he was hungry and thirsty. Suddenly he noticed a small river not far away, and some small fish were floating on the surface of the river? He happily muttered to himself:

This time I won't starve to death. "But then he thought that these dead fish would not taste very delicious. But"Hunger does not choose food"He scooped up the fish and boiled it in a large teacup.

Rep was so hungry that he opened the lid without waiting for the pot to boil, and it didn't matter if he opened it, he was stunned, how could a dead fish come to life? Also swimming around. He tested the temperature of the water with his hands, and estimated that the lowest was more than 50.

Originally, this island of Itupuru was a famous volcanic island, and there is a lake just below this crater. Due to volcanic activity, the lake is hot, and the water temperature can sometimes reach about 70, but in such hot water there is a small fish. The fish caught by Rep are the ones that can tolerate high temperatures, but if they are placed in cold water or the original temperature is changed, the fish will freeze and fall unconscious.

There are also fish that can withstand high temperatures. There is a small fish in Yunnan, China, which can survive in 48 hot springs; A river in the U.S. state of California is home to a hot water carp with an average water temperature of 55; There is also a small light black fish that lives in the hot springs of the eastern region of Antananarivo, the capital of Madagascar, where the temperature reaches up to 75, and it can be said that it is one of the most resistant to heat in the world.

<> salamander is a relatively heat-sensitive animal, and the water temperature suitable for the growth of salamander is 18 -22. The water source of artificially cultivated baby fish is clear, cool and flowing water, and the upstream water of the water source should be non-toxic and harmless, and meet the fishery water standards.

Tips: Baby fish is a wild protected animal, and the protection of wild animals starts from itself, refuses to buy and sell wild animal products, and does not interfere with the free life of wild animals. At present, the behavior of eating rare and endangered wild animals in the society is not only a bad social habit, but also one of the reasons why illegal hunting and killing of rare and endangered wild animals have been repeatedly banned.

If there is no trade, there is no killing, and the consumption of wild animals is not eliminated, they do not belong on the table.

Some fish are afraid of the cold, and some fish are not afraid of the cold. Tropical fish are cold-sensitive fish. When the water temperature drops below 20, the vitality of the fish decreases.

Wide-temperature fish have a certain tolerance for low temperature environments, and as long as the water does not freeze, the fish will not freeze to death. Common cold-water fish include koi, goldfish and other fish, and the water temperature can be controlled at about 25 to make them grow healthily.

There are many types of fish, some fish are afraid of cold, and some fish are not afraid of cold. Common tropical fish are cold-sensitive fish, the water temperature should not be lower than 20 when raising, and the fish will reduce their vitality when the temperature is too low, and even freeze to death.

Wide-temperature fish and cold-water fish have a certain tolerance for low temperatures, and as long as the water does not freeze, the fish will not freeze to death. In addition, some deep-sea fish can tolerate low temperatures of 0 Xiang Pei-2.

Common cold-water fish are koi, goldfish and other fish, and the water temperature can be controlled at about 25 to make them grow healthily, but it is recommended to place a heating rod in the fish tank to ensure that the water temperature is constant.

Reasons why fish are not afraid of the cold:

1. When the temperature drops, many fish move seasonally to deep waters. The warmer groundwater there helps keep the aquatic habitat freezing.

2. Some fish have evolved enzymes called isoenzymes to perform the same function at different optimal temperatures. Other fish make use of alleles—different forms of the same enzyme controlled by different alleles that allow reactions to work at different temperatures.

Tongshu Sen regulates metabolism and regulates body temperature to achieve a balance with the external environment, which makes people mistakenly think that they are not afraid of cold, and frozen fish will also have various reactions to be afraid of cold, and even hibernat.

3. In polar ocean systems, high salt concentrations will reduce the freezing point of water to about 2, which is lower than the freezing point of body fluids of most species. In these habitats, several species, most notably not tropical but also cod and some herring, antifreeze proteins prevent blood crystallization. This allows them to survive in the harsh polar regions covered in snow and ice.

4. Salt concentration. Other species have beaten the ultra-cold brine in their own games. Marine fish must constantly output ions to maintain osmotic equilibrium. However, being gentle and retaining more ions helps to lower the freezing point of the fish and to survive in sub-zero temperatures.

Introduction

Some fish simply can't withstand the cold. Large-scale winter fish kills often occur under conditions of extreme temperature fluctuations. In 2011, for example, about 100,000 fish in the U.S. died in the Arkansas River, and a few warm weeks later saw a particularly cold front blow.

Finally, many ponds and small lakes are experiencing winter deaths, and a large number of fish kills are not because of the cold, but because ice restricts oxygen exchange. Fish may suffocate and float to the surface, where they get stuck in the ice.

Goldfish are afraid of heat. Goldfish are cold-water fish, not afraid of cold, body temperature changes with water temperature, and can survive in water temperatures ranging from 0-39 degrees Celsius. Goldfish is a variant of crucian carp, with many species and large differences in the shape of distribution and luck.

The tolerance temperature of goldfish is between 0 degrees Celsius and 39 degrees Celsius, which is not wrong at all, although including temperature, light, climate, air pressure, and even wind, frost, snow and rain will have a certain impact on the growth of goldfish, but for goldfish, the most influential factor is still temperature.

Precautions for raising goldfish:

When farming goldfish, there are many aspects that need to be paid attention to so that they can be raised well. The first is the problem of oxygen, in order to avoid the problem of hypoxia, you can put in an oxygen pump to inject oxygen. Then there is the environmental problem, we should try to use a larger fish tank, and the breeding density should not be too high.

In addition, there is a problem with water quality, and it is recommended to change the water frequently to ensure water quality. The water change cannot be changed all at once, and about one-third of the water can be changed each time. This prevents the fish from being harmed by sudden changes in the water environment.

As you know, the North and South Poles are frozen and cold all year round, especially in Antarctica, where the lowest temperature can reach minus 90 degrees Celsius. It is hard to imagine surviving and moving in such low temperatures. It is difficult for people to survive in thick clothes, so how can the fish here survive in such cold weather?

If the animals that live here do not have thick fur and fat, the consequences are unimaginable, but the researchers of the Antarctic expedition found that there are fish living here. They are bare and have very little fat. They are not afraid of the cold and swim freely in the cold water.

As ectotherms, fish have a body temperature that changes with the water temperature and becomes the same as the water temperature in order to adapt to their surroundings. But the water temperature off the coast of the Antarctic continent is below freezing, so why haven't the fish frozen to death, and why haven't they been frozen into ice?

Out of curiosity about this question, the Antarctic expeditions caught the world's most cold-resistant Antarctic cod and brought it back to the laboratory for experts to study. Experts have found that compared to fish from other regions, Antarctic fish contain a high molecular weight protein in their body fluids that interact with ice or water to reduce the temperature at which the water freezes.

This protein in fish allows them to remain non-icy in sub-zero waters. It is precisely by relying on this "capital" that the fish of Antarctica can swim freely in the ice and snow. This antifreeze protein is like an antifreeze for a car.

It seems that in order to adapt to the surrounding environment, the animals are also very hard.

Because fish are ectotherms, the body temperature of ectotherms changes with the environment, so fish do not feel cold.

The main reason why fish are not afraid of cold all year round is because fish are ectotherms. Its body temperature changes with the surrounding environment. In winter, when the ambient temperature drops, the body temperature of the fish also drops. In the summer, when the temperature rises, the body temperature of the fish also rises.

Fish are not afraid of cold and heat all year round because they are in deep water, and the temperature in deep water is constant, so they are not afraid of cold or heat, and fish also have a special physique, which is conducive to their protection from cold.

Because the water temperature changes according to the climate, in the summer, the fish will jump out of the water, and in the winter, the fish will hide in the deeper water, or in the place where there are many aquatic plants to keep warm.

The most fundamental reason why people are afraid of cold is that our body temperature is relatively constant, and animals are essentially ectothermic animals. They can directly change and control their body temperature through bodily functions.