It is the largest surviving toothed whale, known for its huge head and unique teeth. There are significant differences in the number and size of teeth between genders and individuals, with males typically having more teeth than females. Having larger teeth that can grow up to 20 centimeters long, conical in shape, mainly located in the lower jaw. Teeth may serve a display function during mating and competition for mates, but are not used for predation. The teeth of female sperm whales are usually smaller and sometimes even underdeveloped, with almost no gum exposed. Sperm whale teeth are composed of dentin, a hard tissue that can resist the immense pressure of deep-sea predation.

It is the largest surviving toothed whale, known for its massive head and complex sonar system. The head accounts for one-third of its body length and contains special ear structures that are crucial for their navigation and communication in deep-sea environments. The ears of sperm whales do not have obvious external ear structures like terrestrial mammals, but are hidden in complex structures on the head. Characterized by high adaptability to deep-sea environments, including an inner ear structure capable of withstanding extreme water pressure. The hearing is very sensitive and can detect very low frequency sounds that travel far underwater, helping to locate prey, navigate, and communicate with companions.

It is the largest toothed whale in the world and one of the largest surviving predatory mammals. Known for its huge head and unique water spray holes, the head can account for one-third of the body length. Mainly living in the deep sea, feeding on squid and fish, especially giant squid. Distributed in tropical and temperate waters worldwide, typically active in waters deeper than 1000 meters. Large in size, adult individuals can grow up to 18 meters in length and weigh up to 50 tons. The social structure is complex, with intricate communication methods including various sounds and body language. Extremely strong diving ability, able to dive to depths below 2000 meters and search for food.

Sperm whales are marine mammals belonging to the order Cetiformes and family Spermatidae. With a body length of up to 18 meters and a weight of over 50 tons, it is the largest toothed whale, with its head occupying one-third of its body. The head is huge, the lower jaw is small, and only the lower jaw has teeth. No dorsal fin; Highly capable of diving, it is the mammal with the deepest and longest diving time. Like a fish in size, it breathes through its lungs. Short neck, the head seems to be connected to the torso; Cervical spine healing; The nostrils are spray holes located at the snout end, the forelimbs become fins, the forearms degenerate, the palms become longer, and the number of toes increases, but the toes and claws cannot be seen from the outside; Hind limb degeneration; The tail is like a fish, with horizontal tail fins, and it swings by the tail when swimming.

Sperm whales are marine mammals belonging to the order Cetiformes and family Spermatidae. With a body length of up to 18 meters and a weight of over 50 tons, it is the largest toothed whale, with its head occupying one-third of its body. The head is huge, the lower jaw is small, and only the lower jaw has teeth. No dorsal fin; Highly capable of diving, it is the mammal with the deepest and longest diving time. Like a fish in size, it breathes through its lungs. Short neck, the head seems to be connected to the torso; Cervical spine healing; The nostrils are spray holes located at the snout end, the forelimbs become fins, the forearms degenerate, the palms become longer, and the number of toes increases, but the toes and claws cannot be seen from the outside; Hind limb degeneration; The tail is like a fish, with horizontal tail fins, and it swings by the tail when swimming.

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.

Also known as Atlantic Pilot Whale or Black Roundhead Whale, it is one of the two species in the Pilot Whale genus. Intermittent distribution in temperate and near polar regions of the northern and southern hemispheres. Long limbed pilot whales are a group of organisms that prefer to live in cold saltwater areas between 13-30 ℃. Diving depths range from 30-1800 meters, with significant variations, typically only active in the 30-60 meter water layer, and can last for several minutes. On June 16, 2017, in the Faroe Islands, a former Danish colony in Northern Europe, locals collectively hunted giant whales by the seaside, causing the seawater to be "dyed" red. According to statistics, the Faroe Islands slaughter over 950 giant whales annually, producing more than 500 tons of whale meat and blubber.