There are over 340 known types of shark, 32 of these species have been reported as attacking humans.
Any shark that's 2m or longer can be dangerous but there are three species that have been involved in a lot of attacks. They are:
- Great Whites
- Tiger sharks
- Bull sharks.
These are all big sharks that normally feed on marine mammals like seals.
The Great Whites have been involved in the most attacks worldwide.