The baby whale develops a thick layer of blubber to protect it from the cold sea.
幼鲸长出一层厚脂肪以抵御冰冷的海水。
《柯林斯英汉双解大词典》
2
Whereas dolphins and whales rely on thick blubber to help keep warm in cold water, fur seals and sea otters depend on dense fur to trap a layer of air against their bodies.