Thousands of amateur and professional photographers slipped into their wetsuits and came face-to-face with extreme danger in the pursuit of the best underwater photograph of the year.
From an open-mouthed shark to the wreckage of a ship, the spectacular photographs taken from the depths of the sea baffle the imagination and show nature at its most spectacular.
Hamid Rad won best in show with his portrait of a fish-eye view of the world. The picture, taken in New Guinea, won the reefscapes category and was selected as the best overall shot in this year's competition.
Thousands of photographers from 15 countries entered into the seven categories- compact cameras, divers, animal portraits, animal behaviour, reefscapes, surfs and sharks.
15 per cent of proceeds from the entries are donated to marine conservation projects. More than £50,000 worth of prizes have been awarded to group finalists and winners.
The competition, in its seventh year, is part of a series of underwater imaging events and has become one of the biggest and most prestigious in the world.