Dolphins protect extreme swimmer from shark during open water challenge

Dolphins protected an extreme swimmer from Nottinghamshire when a shark circled, during an open water challenge.

Adam Walker is the only Briton ever to successfully complete the world's toughest open water challenge, Oceans Seven.

View all 3 updates ›

'Gruesome' Portuguese Man-of-war sting for swimmer

An extreme swimmer from Nottinghamshire, who is the only Briton ever to complete the Oceans Seven challenge, has described the 'gruesome' pain of being stung by a Portuguese Man-of-war.

Adam Walker still managed to complete his seven swims that took place all over the world, and on one he was protected from a shark by dolphins!

More top news