Winner of Ocean Photographer of the Year, Aimee Jan: A green turtle, surrounded by glass fish in Ningaloo Reef, Western Australia. 'I was out snorkelling when one of my colleagues told me there was a turtle under a ledge in a school of glass fish, about 10 metres down,' says Jan. 'When I dived down to look, the fish separated around the turtle perfectly. I said to her: ‘I think I just took the best photo I have ever taken’.'

Ocean Photography Awards 2021: winners' stunning deep-sea images unveiled