An animal 'X' is found in areas covered with ice and snow. It has thick layer of fat beneath the skin. It lives in groups to protect itself from cold. Unscramble the given words and identify the animal 'X'.
AIONPRSOC
BESHROESA
CTPOSCOU
DGUNEPN
The correct answer, D, does not have the letter I, not leading to the correct spelling of PENGUIN when unscrambled