Doug Perrine / Pink anemonefish {Amphiprion perideraion} on host sea anemone {Heteractis magnifica} Great Barrier Reef, Queensland, Australia

Mark Brownlow / Aerial view of Great Barrier Reef, Queensland, Australia September 2006, BBC Planet Earth

Juergen Freund / Anchovies {Engraulis encrasicolus} Great Barrier Reef, Australia.

Michael Pitts / Brain coral on coral reef Great Barrier Reef, Australia.

Juergen Freund / Aerial view of Great Barrier Reef, Queensland, Australia

Georgette Douwma / Tiger shark patrolling shallow water for egg laying turtles. Australia {Galeocerdo

Doug Perrine / Lined sweetlips {Plectorhynchus lineatus} Ribbon Reefs, Great Barrier Reef, Australia (Non-ex).

Jeff Rotman / Tiger shark portrait (Galeocerdo cuvieri) Great Barrier Reef, Australia

Juergen Freund / Dwarf Minke whale diving {Balaenoptera acutorostrata} Great Barrier Reef, Queensland, Australia

Juergen Freund / Potato grouper / cod {Epinephelus tukula} Great Barrier Reef, Queensland, Australia

Juergen Freund / Shovelnose ray {Rhinobatos batillum} Great Barrier Reef, Queensland, Australia

Juergen Freund / Minke whale {Balaenoptera acutorostrata} Great Barrier Reef, Queensland, Australia