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.

Itachi shark, a large shark belonging to the genus Itachi in the order Siluriformes. Itachi shark, distributed in the Yellow Sea, East China Sea, northeast and southwest waters of Taiwan, and South China Sea; Widely distributed worldwide between 40 degrees north and south latitude in various oceans. The weasel shark is a warm water shark with a fierce nature. The weasel shark is the only ovoviviparous species among true sharks. Weasel sharks are considered to be more aggressive sharks, although they usually avoid humans, they may also exhibit aggressive behavior if humans cross or dive within their territory. The feeding habits of the weasel shark have earned it a nickname - 'the garbage bin of the sea'.