"Grey Reef Shark (Carcharhinus amblyrhynchos) swimming above sandy sea floor, UNESCO World Heritage Site, Great Barrier Reef, Australia, Pacific Ocean, Oceania"

"Knotted Fan Coral (Melithaea-ochracea), scuba diver at the back, Great Barrier Reef, UNESCO World Natural Heritage Site, Pacific Ocean, Queensland, Australia, Oceania"

"Scuba diver behind Knotted Fan Coral (Melithaea ochracea), soft coral, Great Barrier Reef, UNESCO World Natural Heritage Site, Pacific Ocean, Queensland, Australia, Oceania"

"Valentinni's Sharpnose Puffer or Black Saddled Toby, (Canthigaster valentini), courting, Great Barrier Reef, UNESCO World Natural Heritage Site, Pacific Ocean, Queensland, Australia, Oceania"

"Red-Gilled Nembrotha (Nembrotha rutilans), feeding on Sea Squirts (Ascidiacea), Great Barrier Reef, UNESCO World Natural Heritage Site, Pacific Ocean, Queensland, Australia, Oceania"

"White-spotted Hermit Crab (Dardanus megistos) on sandy ground, UNESCO World Heritage Site, Great Barrier Reef, Australia, Pacific Ocean, Oceania"

"Swarm of Bigeye Snapper (Lutjanus lutjanus) in front of a block of coral, Great Barrier Reef, UNESCO World Natural Heritage Site, Pacific Ocean, Queensland, Australia, Oceania"

"Round Ribbontail Ray (Taeniura meyeni) swimming over a coral reef with Magnificent Sea Anemone or Ritteri Anemone (Heteractis magnifica), Great Barrier Reef, UNESCO World Natural Heritage Site, Pacific Ocean, Queensland, Australia, Oceania"

"Grey Reef Shark (Carcharhinus amblyrhynchos) at cleaning station with a Bluestreak Cleaner Wrasse (Labroides dimidiatus), on a sandy sea floor, UNESCO World Heritage Site, Great Barrier Reef, Australia, Pacific Ocean, Oceania"

"Shoal of Sabre Squirrelfish, Giant Squirrelfish or Spiny Squirrelfish (Sargocentron spiniferum) swimming in front of a coral reef, UNESCO World Natural Heritage Site, Pacific Ocean, Queensland, 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

"Masked puffer (Arothron diadematus), resting at night on stony coral, Great Barrier Reef, Pacific, Australia, Oceania"

Aerial view Great Barrier Reef, Queensland, Australia, Oceania

Aerial view Great Barrier Reef, Queensland, Australia, Oceania

Aerial view Great Barrier Reef, Queensland, Australia, Oceania

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

Titan triggerfish (Balistoides viridescens), Great Barrier Reef, Australia, Oceania

Red snapper (Lutjanus bohar), Great Barrier Reef, Australia, Oceania

Titan triggerfish (Balistoides viridescens), Great Barrier Reef, Australia, Oceania

Malabar grouper (Epinephelus malabaricus), Great Barrier Reef, Australia, Oceania

Malabar grouper (Epinephelus malabaricus), 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

"Whiptail Stingray (Dasyatidae) resting on the sandy ocean floor, Great Barrier Reef, UNESCO World Natural Heritage Site, Pacific Ocean, Queensland, Australia, Oceania"