Jurgen Freund / Jo Browne and Kade Mills use a cylinder cone shaped plankton net to sample gelatinous zooplankton for Coral Reef census, Lizard Island, Queensland, Australia, April 2008. Not released

Juergen Freund / Split level of mangrove roots exposed at low tide, Lizard Island, Queensland, Australia, April 2008

Juergen Freund / Charlotte Watson snorkels down to collect sand which may contain polychaete worms, Coral Reef census, Lizard Island, Queensland, Australia, April 2008. Model released

Juergen Freund / Coral spawning in the Great Barrier Reef happens every year in November 3 - 5 days after full moon, Great Barrier Reef, Queensland, Australia

Juergen Freund / Quicksilver Pontoon with tourists snorkeling watching fish split-level, Great Barrier Reef, Queensland, Australia 2006

Juergen Freund / Aerial view of the Great Barrier Reef. Agincourt Reefs, off Port Douglas, Queensland

Juergen Freund / Aerial view of Green Island, on the Great Barrier Reef, Queensland, Australia

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

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

Georgette Douwma / Potato grouper (Epinephelus tukula) Great Barrier Reef, Australia

Georgette Douwma / Seafan {Gorgonacea} Great Barrier Reef, Australia

Georgette Douwma / Seafan {Gorgonacea} Great Barrier Reef, Australia