A green turtle, surrounded by a ball of glass fish, one of four turtle species found on Ningaloo Reef, the world’s largest fringing reef. “We were doing a back-of-the-reef snorkel when one of my work friends called me over to tell me there was a turtle under a ledge in a school of glass fish, about 10 metres down,” says photographer Aimee Jan. “When I dived down to look, the fish separated around the turtle perfectly and this is what I saw. I said to her: ‘I think I just took the best photo I have ever taken’.”