If you are attacked by a shark, it is important to fight back and get out of the water as soon as possible, but there are also important tips to learn to avoid a shark encounter. Sharks generally don’t like to eat humans. When sharks bite humans it is usually a “hit and run,” where they bite the human out of curiosity and swim away. This usually happens in shallow water and is rarely lethal.
Of the 400 or so shark species on the planet, the shortfin mako shark is thought to be the fastest, capable of swimming at speeds from 22 to 60 miles per hour. Makos are aggressive, however attacks on humans are rare because the species usually stays in the open ocean.
There are approximately 470 known species of shark in the world, but it's impossible to count the exact number of individual sharks on the planet. World Wildlife Fund estimates that more than 100 million sharks are killed each year for their fins.