Question

Animals of colder region and fish of colder waters have a thick layer of body fat under the skin. Why?​

Answer 1

Answer: That thick layer of fat is called blubber and it's function is

To prevent heat loss and to protect them from cold weather.

Answer 2

Answer:

animals of colder regions and fishes of cold water have a thicker layer of subcutaneous fat, in order to retain heat in their body and thus maintaining the body temperature