Charlie Summers / Cocos Purple Land Crab (Cardisoma carnifex) in defensive position. Cocos-Keeling Island, Indian Ocean, Australia, May.

Charlie Summers / A bottle-nosed Dolphin (Tursiops truncatus) jumping with a Remora (Echeneidae) attached to its flanks. The Cocos-Keeling Island group of Australia, November.

Charlie Summers / A Royal Australian Airforce Hercules C-130 taking off with vortices visible from the propeller blades. Cocos-Keeling Island group, Australia, the Indian Ocean, November.

Charlie Summers / Indian Ocean White Tern (Gygis alba candida) in flight against blue sky, Island in the Cocos-Keeling island group of Australia, November

Charlie Summers / Eel (Callechelys sp.) feeding on Cocos Island Ghost Crab (Ocypode sp) prey, in a shallow tidal pool, West Island in the Cocos-Keeling Islands, Australian external territory. November

Charlie Summers / Horn-eyed Ghost Crab (Ocypode ceratophthalma) in the edge of the surf on a Cocos-Keeling Island beach, Australian external territory in the Indian Ocean.

Charlie Summers / Horn-eyed Ghost Crab (Ocypode ceratopthalma) on a Cocos-Keeling Island beach, Australian external territory in the Indian Ocean.

Charlie Summers / Cocos-Keeling / Blue Land Crab (Cardisoma carnifex) on beach, North Keeling, Cocos-Keeling Island Group, Australia.

Charlie Summers / Strawberry land Hermit Crab (Coenobita perlatus) moving across beach, in early morning. Cocos-Keeling Island group of Australia.

Charlie Summers / Indian Ocean White Tern (Gygis alba candida) hovering overhead. West Island in the Cocos-Keeling Island chain of Australia in the Indian Ocean.

Charlie Summers / Aerial view of Cocos-Keeling's West Island Australian Island in the Indian Ocean.

Juergen Freund / Woman snorkelling at sea surface,Cocos Keeling Island in background, Indian Ocean, Australia