4. Sharks

Despite the fact that only four of more than 568 species of shark “have been involved in a significant number of fatal unprovoked attacks on humans” – the great white shark, tiger shark, bull shark, and the oceanic whitetip shark – the 1975 release of the movie “Jaws” raised fears of man-eating sharks to near-hysteria levels. (Source: Wikipedia)

“Statistically it is incredibly rare for any species of shark to attack,” notes Planet Deadly, “but when they do the results can be so horrific that it is burnt into the popular psyche. Reports of victims bitten in two or half-eaten by sharks the size of a school bus are always going to be at the back of many people’s minds as they dip their toe in the ocean.”