How do fish survive in frozen lakes?
Although it’s true that the water does not freeze when it’s deep, it may be close to freezing which could be bad for fish. Many animals have s super cooling system in their bodies. They have special proteins called glycoproteins that prevent ice crystals from forming in their blood. This allows the blood to flow freely, so you don’t need a pump or anything to keep them alive, as long as the water is deep enough and doesn’t freeze over all the way, they will be fine.
