But most of these attacks were caused by the victim, who foolishly grabbed a motionless nurse shark by the tail. Thresher sharks are long-tailed subtropical fish that swim along the surface. No thresher shark has been known to attack a person. Whale sharks, in spite of their enormous size, eat only plankton and small fish. Therefore, they are harmless to people.
Whale sharks live in tropical waters.
White sharks rank among the most dangerous sharks. White sharks swim powerfully and prey on such large animals as sea lions, tuna, and other sharks. They have attacked human beings and even fishing boats. White shark Sharks and people Shark attacks. About a seventh of the approximately 360 species of sharks are considered potentially dangerous to human beings.