There are 380 species of sharks in the world.

There are 380 species of sharks in the world, *** divided into eight orders and 30 families, about 27 species will attack humans, 12 species may attack humans, and 12 species because of their size and habits, may be dangerous, appearing in the waters near the Taiwan area about 90 species.

Not every shark is streamlined, with the pipistrelle shark having a flat body, the tiger shark having a blunt head and the bamboo shark having a long body.

The eight orders of sharks include the Sixgilliformes, Porbeagle Sharks, Mako Sharks, Tiger Sharks, Flat Sharks, Whisker Sharks, Squalus Sharks, Squalus Sharks and Sawfish Sharks. Among them, Mako and Squaliformes accounted for 77% of all species, and Mako alone accounted for 56%.

Body size of sharks:

Sharks are long fusiform. Gill slits lateral, pectoral fins normal, not fused to leading edge of muzzle; northern fin dorsal; crooked tail type.

80% of shark species are under 1.6m in total body length, and the vast majority of sharks are small fish. Sharks in the largest for the whale shark, also known as the whale grain, up to 20m, weighing 7000-8000kg, can be called the king of the fish, the smallest for the broad-tailed small angle shark, mature males 15cm, females 20cm, different types of sharks and their size difference can be more than 100 times.

Now found in the Tertiary stratum fossil species giant man-eating shark, tooth length 15.24cm, estimated body length of up to 90m, the American Museum of Natural History exhibits such a two-jawed model, which can accommodate six people standing in the mouth.

Refer to Baidu Encyclopedia-Sharks