The figure of the vigorous shark in the water

Sharks are very ferocious, they can swallow dozens of small fish at once, and eat the small fish like wind and clouds. Sharks are particularly sensitive to smells in seawater, especially to the smell of blood. The low-frequency vibration or a small amount of bleeding emitted by the irregular swimming of injured fish can attract it from a distance, even surpassing the sense of smell of land dogs. All sharks have cartilage. A shark's skeleton is made of cartilage, not bone. Cartilage is lighter and more elastic than bone. All sharks belong to the class Carcharids, and all sharks have cartilage.