Diving experts say that the danger depends on the type of shark. Some species are quite shy and unlikely to attack humans. Other species are less predictable, but still, these experts say, the number of shark attacks on divers is very low. They say most of them are the result of human stupidity; for example, if a diver tries to grab the shark's tail or fin. If divers use their common sense, diving with sharks is probably the safest of these three extreme dives.