The shark .
Contrary to what movies have led us to believe (you all remember
Steven Spielberg 's
"Jaws"
), sharks don't like human flesh. In fact, every year, out of hundreds of millions of people swimming in the oceans, only 65, on average, are attacked by sharks. Of these attacks, a mere dozen are fatal. Humans, on the other hand, kill approximately 100 million sharks every year, 73 million of which are used to cook soup with their fins. Essentially, a human kills a shark 25 million times before the shark kills a human.
Attacks on humans are almost always caused by these animals mistaking surfers for sea lions or seals, which they crave; or by feeling threatened. Furthermore, for these animals, teeth can function as mechanosensory structures: if we humans feel an object with our hands to discover its texture through touch, sharks—which have no arms—bite for the same reason.
If you ever have the opportunity to dive with sharks, it's best to be prepared and keep a few (but good) rules in mind: choose daytime, preferably a time with plenty of sunlight ; avoid nervous and sudden movements; don't wave your hands ; don't touch the sharks; stay in a group ; stay close to a wall ; maintain an upright position ; always maintain visual contact with the sharks; avoid overly brightly colored equipment and make sure nothing is dangling in the water.