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

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

Juergen Freund / Grey reef shark {Carcharhinus amblyrhynchos} with Remora fish, Great Barrier reef, Queensland, Australia

Georgette Douwma / Jewel tip coral {Porites attenuata} Great Barrier Reef, Australia

Jeff Rotman / Tiger shark agressive behaviour {Galeocerdo cuvieri} Great Barrier Reef, Australia

GEORGETTE DOUWMA / Jewel tip coral {Porites attenuata} Great Barrier Reef, Australia

GEORGETTE DOUWMA / Finger coral {Porites cylindrica} and Bristlestar, Great Barrier Reef, Australia

GEORGETTE DOUWMA / Hard coral {Acropora echinata} Great Barrier Reef, Queensland, Australia

Aflo / ic-09201 Flock of terns {Sterninae} on beach, Great Barrier reef, Queensland, Australia.

Jeff Rotman / Tiger Shark (Galeocerdo cuvier) demonstrating aggressive behavior, Great Barrier Reef, Australia, Coral Sea.

Jeff Rotman / Eye of Tiger shark (Galeocerdo cuvier), nictitating membrane closing to protect eye, Great Barrier Reef, Australia, Coral Sea.

Juergen Freund / Research / Diving boat 'Undersea Explorer' with guests and crew at the bow of the boat in Cod Hole, Great Barrier Reef, Queensland, Australia, 2007

Juergen Freund / Split level of research / diving boat 'Undersea Explorer' with free diver exploring the coral reef, Pixie Pinnacle, Great Barrier Reef, Queensland, Australia, 2007

Juergen Freund / Research / Diving boat 'Undersea Explorer's back dive deck with divers, Great Barrier Reef, Queensland, Australia, 2007

Juergen Freund / Close up of spines of Crown-of-Thorns starfish (Acanthaster planci) Great Barrier Reef, Australia

Juergen Freund / Acropora coral field with different species in foreground, Great Barrier Reef, Australia

Juergen Freund / Acropora coral field with different species in foreground, Great Barrier Reef, Australia

Juergen Freund / Soft coral {Sarcophyton sp Great Barrier Reef, Australia

Juergen Freund / Acropora coral, Great Barrier Reef, Australia

Juergen Freund / Close up of Crown-of-Thorns Starfish (Acanthaster planci) feeding on Acropora coral, Great Barrier Reef, Australia.

Juergen Freund / Lost fishing net entangled in coral reef, Great Barrier Reef, Australia

Juergen Freund / Lettuce coral {Turbinaria reniformis} Great Barrier Reef, Australia

Juergen Freund / Hydroids growing on coral reef, Great Barrier Reef, Australia

Juergen Freund / Bright red fluorescent coral head, Great Barrier Reef, Australia

Juergen Freund / Coral reef landscape in the far northern Great Barrier Reef, Australia

Juergen Freund / Katharina Fabricius collecting octocorals {Alcyonaria} for Coral Reef census, Great Barrier Reef, Australia 2008

Juergen Freund / Crown-of-Thorns Starfish (Acanthaster planci) feeding on Acropora coral, Great Barrier Reef, Australia.

Juergen Freund / Staghorn coral {Acropora sp} growing out of tablecoral, Great Barrier Reef, Australia

Juergen Freund / Close up of soft coral {Alcyonacea} polyps closed, Great Barrier Reef, Australia

Juergen Freund / Close up of soft coral {Alcyonacea} polyps feeding, Great Barrier Reef, Australia

Juergen Freund / Close up of Acropora coral, Great Barrier Reef, Australia

Juergen Freund / Bleached and healthy Acropora coral, Great Barrier Reef, Australia

Juergen Freund / Close up of coral polyps, Great Barrier Reef, Australia

Juergen Freund / Striped triplefin fish {Helcogramma striata} on hard coral, Great Barrier Reef, Australia

Juergen Freund / Close up of (Acropora sp) coral fungus coral, Great Barrier Reef, Australia

Juergen Freund / Close up of Acropora coral, Great Barrier Reef, Australia

Juergen Freund / Craig Humphrey and Katharina Fabricius collecting Porites coral head for Coral Life census, Great Barrier Reef, Australia 2008

Juergen Freund / Craig Humphrey and Katharina Fabricius conducting reef survey for Coral Life census, Great Barrier Reef, Australia 2008

Juergen Freund / Craig Humphrey conducting reef survey for Coral Life census, Great Barrier Reef, Australia 2008

Juergen Freund / Coral reef in the far northern outer Great Barrier Reef. Coral formations are streamlined because of heavy surf and waves throughout the year. Mostly (Acropora palifera) Queensland, Australia

Juergen Freund / Coral reef in the far northern outer Great Barrier Reef. Coral formations are streamlined because of heavy surf and waves throughout the year. Mostly (Acropora palifera) Queensland, Australia

Juergen Freund / Coral reef in the far northern outer Great Barrier Reef. Coral formations are streamlined because of heavy surf and waves throughout the year. Mostly (Acropora palifera) Queensland, Australia

Juergen Freund / Coral reef in the far northern outer Great Barrier Reef. Coral formations are streamlined because of heavy surf and waves throughout the year. Mostly (Acropora palifera) Queensland, Australia

Juergen Freund / Looking down through shallow water at Coral reef in the far northern outer Great Barrier Reef on an exceptionally calm day, Queensland, Australia.

Juergen Freund / Looking down through shallow water at Coral reef in the far northern outer Great Barrier Reef on an exceptionally calm day, Queensland, Australia.

Juergen Freund / Damaged coral reef, possibly storm damage, Great Barrier Reef, Australia, 2008

Juergen Freund / Split level of diver, Katharina Fabricius, and Porites coral heads in shallow reef, Coral Life census, Great Barrier Reef, Australia, 2008

Juergen Freund / Katharina Fabricius conducting coral survey with Acropora coral in front, Great Barrier Reef, Coral Life census, Great Barrier Reef, Australia 2008

Juergen Freund / Hermit crab {Paguroidea} Great Barrier Reef, Australia

Juergen Freund / Lizard Island Research Station laboratory filled with pressed algae and seaweed specimens. Part of the Coral Reef census, Lizard Island, Queensland, Australia, April 2008

Juergen Freund / Sea cucumber {Holothuroidea} on seabed, Lizard Island, Great Barrier Reef, Queensland, Australia

Juergen Freund / Julian Caley and Shawn Smith install an artificial reef as part of CReefs four year project to check what life form will inhabit this structure, Coral Life census, Lizard Island, Queensland, Australia...

Juergen Freund / Divers collect Octocorals for the Queensland Museum collection as part of the Coral Life census, Lizard Island, Queensland, Australia, April 2008

Juergen Freund / Bivalve found in a dead coral head (Pocillipora verrucosa) as part of Barcode of Life project, Coral Reef census, Lizard Island, Queensland, Australia, April 2008

Juergen Freund / Sea butterfly, also known as Thecosomata or flapping snail, Lizard Island, Queensland, Australia, April 2008

Juergen Freund / Comb jelly {Ctenophora} Lizard Island, Queensland, Australia, April 2008

Juergen Freund / Comb jelly {Ctenophora} close up of reflections, Lizard Island, Queensland, Australia, April 2008

Juergen Freund / Sea butterfly, also known as Thecosomata or flapping snail, Lizard Island, Queensland, Australia, April 2008

Juergen Freund / Jo Browne and Kade Mills use a cylinder cone plankton net to sample gelatinous zooplankton for Coral Reef census, Lizard Island, Queensland, Australia, April 2008

Juergen Freund / Jo Browne and Kade Mills use a cylinder cone plankton net to sample gelatinous zooplankton for Coral Reef census, Lizard Island, Queensland, Australia, April 2008

Juergen Freund / Joanna Browne collecting an 'upside down jellyfish' {Cassiopeia sp} from the sandy bottom of Lizard Island lagoon, for Coral Reef census, Lizard Island, Queensland, Australia, April 2008

Juergen Freund / Giant clam {Tridacna sp} surrounded by blue starfish {Linckia laevigata} Lizard Island, Queensland, Australia, April 2008

Juergen Freund / Brazilian, Fred Gurgel, collecting algae and seaweeds (macroalgae) for Coral Reef census, Lizard Island, Queensland, Australia, April 2008.

Juergen Freund / Split level of granite rocks in sandy lagoon, Lizard Island, Queensland, Australia, April 2008.

Juergen Freund / Mangrove roots exposed at low tide, Lizard Island, Queensland, Australia, April 2008

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

Juergen Freund / Split level of granite rocks in sandy lagoon, Lizard Island, Queensland, Australia, April 2008.

Juergen Freund / Magda Blazewicz handles trawling sand collector underwater to collect sand which may contain Tanaidacea crustaceans, Coral Reef census, Lizard Island, Queensland, Australia, April 2008

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

Juergen Freund / Aerial view of Great Barrier Reef, Queensland, Australia, 2007

Tim Laman / Tropical rock crab (Grapsus tenuicrustatus) in the intertidal zone, Heron Island, Great Barrier Reef Marine Park, Queensland, Australia

Tim Laman / Wreck of the HMCS Protector (Australia's first naval vessel) on the reef at Heron Island, Great Barrier Reef, Queensland, Australia

Tim Laman / Tropical rock crab (Grapsus tenuicrustatus) portrait, Heron Island, Great Barrier Reef Marine Park, Queensland, Australia

NEIL NIGHTINGALE / Sir David Attenborough in scuba diving equipment on location for BBC television series "Private Life of Plants", early 1990s. Heron Island, Great Barrier Reef, Australia