How do creatures as wild horses and fish in rivers survive sub zero winter climes ?

Answer 1

Fish has the so called notothenioid natural anti-freeze which enables them to live in sub zero water temperature.
>>Notothenioid refers to tolerance of the presence of ice crystals within their bodies.The ice crystals are always present in the water around them and are eaten and breathed by the fish. Special proteins, known as anti-freeze glyco proteins, are secreted to prevent ice crystals from forming and growing where they are not wanted within the fish's blood and tissues.

For the wild horses, my suggestion is that their leather skin and hooves play a great role. They have special adaptation to extreme temperatures.Their hooves could grow longer before winter to protect when walking on an icy surface. Their bodies got special insulating system as well. For example:the arteries and veins in their legs are very close together. The outward flowing blood (arteries) warms the inward flowing blood (veins). That allows their body temperature to remain warm while their legs are colder.

Answer 2

The deeper you go, the warmer the water is (during the winter). Only shallow lakes will freeze all the way to the bottom, and those likely will not have fish in them.

Only saltwater remains liquid at freezing temperature because salinity keeps it from freezing at 32 degrees. Some saltwater fish have a type of antifreeze in their veins. See, Ice Fish.

Also, some animals, like certain frogs, can freeze solid and then still unthaw and be alive.

Answer 3

Horses are mammals and control their own temperature. Compared to us humans who would freeze to death, they have a warming fur and a larger volume-to-surface quotient than we have. When its cold, the eat plants from under the snow and generally try to be in the sunshine yet out of the wind and not move too much, conserving energy.
Fish, now, tackle this differently. In rivers and ponds, the surface may freeze, but the water near the bottom ends up at just under 4°C (were it most contracts). Fish stay in there, tuning down their metabolism, moving very little and eating next to nothing until the water warms up once again in spring.
As to some species of ice fish that manage to live in the Antarctic, directly under the ice at -2°C: They have a special anti-freezing agent inside them. Some mountain-dwelling insects have it, too.

Answer 4

Not all breeds do. Regarding certain fish, when the air temperature is below zero, the water temperature is not. This is because when liquid water freezes, it becomes lighter and floats to the top. So the coldest water is on top. If it was not this way, some lakes would freeze solid and kill all the life in them.

Answer 5

wild horses are warm blooded and have thick, insulating fur. A harsh winter likely kills weak/old wild horses.
Some fish can be frozen solid into a block of ice, and survive to swim away upon the thaw.... there is something like antifreeze in their blood....now sure how it works.

Answer 6

well their brains freeze so they don't have to make any instinctual actions. they can then enjoy ice cool weather. o and their lungs just fill up with water and then the freeze into a giant fudgesicle which are quite delicious