Most of us probably think sharks are the most dangerous creatures of the sea - but according to one professional diver you should actually be more afraid of jellyfish.
Kayleigh Grant has enjoyed hundreds of encounters with sharks, often stroking their backs and fending them off with a simple palm on the snout.
Fascinated by the creatures since she found a shark's tooth on one of her first dives, the 35-year-old says she's seen far more injuries and more severe from jellyfish.
