Black-horned shark, also known as "black-horned spiny shark", is an animal recorded in China's ancient book The Three Kingdoms of Gao Xixi. It is also called "Five Spirits" with Kirin, Phoenix, Turtle and Dragon, and is the mount of God. The ancients regarded the black-horned shark as a benevolent beast and a fierce beast. The male is called thorn shark, and the female is called black gold shark. In reality, people often think that Megalodon, a long prehistoric giant shark, is the prototype of the black horn shark, which is often used as a metaphor for extremely powerful people. Black horned sharks prey on cetaceans and dragons. Like other modern sharks, black-horned sharks have cartilage instead of bones, but there is no record of the formation of bone fossils. The black-horned shark's mouth can reach three meters in diameter, its body is strong and streamlined, and it can easily hunt any creature in the sea. And because there is a cannon-like launcher behind the black horn shark, the dragon in the air is also his main food. The teeth of the black horn shark are similar to those of the great white shark, about 9.625 inches long (the maximum inclined length). It is speculated that the largest body of a black-horned shark is 28 meters long and can eat a Tyrannosaurus Rex. Judging from this figure, the weight of black horn shark can reach 60 tons. Assuming that the great white shark is directly proportional to its metabolism, it needs to eat 50%(2400 kg) of its body weight every day on average. Judging from the prehistoric food chain, it is generally believed that it feeds on whales, but it also preys on other mammals in the ocean and sky.