According to a cat network that looks at the world, man-eating sharks, whale sharks and basking sharks are all listed as national second-class key protected wild animals. Protecting sharks can maintain the balance of marine ecology. As a top predator, it plays an irreplaceable role in controlling the quantity and structure of marine life. The mass disappearance of sharks will definitely upset the balance of the whole marine food chain, trigger a series of chain reactions and cause a devastating blow to the whole ecosystem.