Christmas Island is bound by a narrow fringing coral reef, before it drops off into the abyss. The marine environment around this remote outpost is spectacular; crystalline oceanic water bathes the vertical reef edge and provides an indigo backdrop for gigantic schools of batfish and thriving coral gardens.

Christmas Island

Nikon D300, AF DX Fisheye-Nikkor 10.5mm f/2.8G ED, 1/200, f8, ISO 400; Ikelite underwater housing and twin DS160 strobes

by Justin Gilligan, New South Wales