Marine mammals of the order Cetiformes and family Sperm Whales. With a body length of up to 18 meters and a weight of over 50 tons, it is the largest toothed whale and the deepest and longest diving mammal. Like a fish in size, it breathes through its lungs. Sperm whales prefer to live in groups, often consisting of a small number of male whales and large groups of female and juvenile whales forming large groups of dozens or even two to three hundred. Sexually fierce. The marriage system of one male and multiple females. The geographical range of distribution is very wide. But it is usually found in the continental slope or deeper waters. The dried secretion of sperm whale intestines is called "ambergris", which is not only a precious spice but also a precious traditional Chinese medicine.