during the winter, air temperature in the northen united states can reamin below o'c for moths and looks can freeze, however, the fish and other animal living in the lakes survive?
Because ice is less dense than water, it's able to float on top of the lake and act as an insulator for the water below. The ice is like a lid and doesn't allow heat to escape as easily if the water didn't have ice. The temperatures under the ice are then warm enough for fish and other animals to survive in.
