Is the fish in deep water or in the weather from zero to 14.5 degrees?

When the water surface temperature is 0 degrees, the temperature in the deep water area is generally constant at 4 degrees; When the water temperature is getting higher and higher, but not more than 4 degrees, fish will also stay in warm deep water; When the temperature continues to rise, fish will feed in shallow water due to the growth activities of microorganisms and other animals and plants on the water surface.