Limestone skeleton of the Klunzinger soft coral (Dendronephthya klunzingeri), Pacific, Great Barrier Reef, UNESCO World Heritage, Australia, Oceania

Diver is looking at large Klunzinger's Soft Coral (Dendronephthya klunzingeri), red, Great Barrier Reef, UNESCO, World Natural Heritage, Queensland, Cairns, Australia, Pacific Ocean, Oceania

Detail of Eye patch sea cucumber (Bohadschia argus), Pacific, Great Barrier Reef, Australia, Oceania

Soft coral, leather coral (Lobophytum) with semi-enclosed polyps, detail, Pacific, Great Barrier Reef, UNESCO World Heritage, Australia, Oceania

Scuba diver looking at red, unidentified coral sea fan on coral reef, steep wall, backlit, sun, Great Barrier Reef, UNESCO World Heritage Site, Cairns, Queensland, Australia, Pacific, Oceania

Scuba diver with torch looking at a Melithea Gorgonian Coral (Melithea sp. ) at coral reef, Great Barrier Reef, UNESCO World Heritage Site, Cairns, Queensland, Australia, Pacific, Oceania

Open coral polyps on the trunk of a soft coral (Dendronephthya), coral, Pacific, Great Barrier Reef, UNESCO World Heritage, Australia, Oceania

Detail of tail fin, parrot fish (Scarus), Pacific, Great Barrier Reef, UNESCO World Heritage, Australia, Oceania

Underside with mouth of spiny cushion star (Culcita novaeguineae), Detail, Starfish, Pacific, Great Barrier Reef, Australia, Oceania

Scuba diver catching and looking at Colubrine Sea Krait (Laticauda colubrina), in blue water, Great Barrier Reef, UNESCO World Heritage Site, Cairns, Queensland, Australia, Pacific, Oceania

Scuba diver watching school of Fairy Basslets (Pseudanthias lori), at bushy Soft Coral (Siphonogorgia godeffroyi), Great Barrier Reef, UNESCO World Heritage Site, Cairns, Queensland, Australia, Pacific, Oceania

Graphic structure on underside of Red Pillow Starfish (Halithyle regularis), detail, Pacific, Great Barrier Reef, UNESCO World Heritage, Australia, Oceania

Barramundi Cod (Cromileptes altivelis), Great Barrier Reef, Australia, Oceania

Barramundi Cod (Cromileptes altivelis), Great Barrier Reef, Australia, Oceania

Barramundi Cod (Cromileptes altivelis), Great Barrier Reef, Australia, Oceania

Kuhl's stingray (Neotrygon kuhlii), Great Barrier Reef, Australia, Oceania

Watsons Bay Lizard Island, Great Barrier Reef, Australia, Oceania

Giant Moray moray (Gymnothorax javanicus), Great Barrier Reef, Australia, Oceania

Pink skunk clownfish (Amphiprion perideraion), Great Barrier Reef, Australia, Oceania

Giant Moray moray (Gymnothorax javanicus), Great Barrier Reef, Australia, Oceania

Pair of bannerfish (Heniochus acuminatus), Great Barrier Reef, Australia, Oceania

Aerial view of Green Island, Great Barrier Reef, Queensland, Australia, Oceania

Shoal of bigeye spiny dogfish (Caranx sexfasciatus), Great Barrier Reef, Australia, Oceania

Shoal of darkfin barracuda, Sphyräna qenie, Great Barrier Reef, Australia, Oceania

"Divers looking at lettuce coral (Turbinaria mesenterina), Great Barrier Reef, Pacific, Australia, Oceania"