Sharkman, real name Mike Rutzen, has earned worldwide fame for swimming with the predators without the safety of a diving cage.
The former fisherman is on a crusade to show that the huge fish are not bloodthirsty killers but are intelligent and sensitive creatures.
He also wants to highlight their status as an endangered species - their jaws can fetch tens of thousands of pounds on the black market.
To successfully swim with sharks, Mike has learned to mimic their body language, changing his posture in response to their actions.