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

Dugong (Dugong dugon), feeding on sea weed, Golden Trevallys (Gnathodon speciosus), Pilot Fish, Great Barrier Reef, UNESCO World Heritage Site, Queensland, Cairns, Australia, Pacific Ocean, Oceania

School of Humpback Red Snappers (Lutjanus gibbus) swimmimg in front of coral reef, Great Barrier Reef, UNESCO World Heritage Site, Cairns, Queensland, Australia, Pacific, Oceania

Dugong (Dugong dugon) feeding on seagrass bed, with Golden Trevallys (Gnathanodon speciosus), Great Barrier Reef, UNESCO World Heritage Site, Cairns, Queensland, Australia, Pacific, Oceania

Dugong (Dugong dugon) feeding on seagrass bed, with Golden Trevallys (Gnathanodon speciosus), Great Barrier Reef, UNESCO World Heritage Site, Cairns, Queensland, Australia, Pacific, Oceania

Blackspotted Puffer (Arothron nigropunctatus, Arothron citrinellus), yellow variety, swimming in coral reef, Great Barrier Reef, UNESCO World Heritage Site, Cairns, Queensland, Australia, Pacific, Oceania

Oceanic Whitetip Shark (Carcharhinus longimanus) in blue water, shadow of boat in the back, Great Barrier Reef, UNESCO World Heritage Site, Cairns, Queensland, Australia, Pacific, Oceania

Scuba diver watching a Tasseled Wobbegong (Eucrossorhinus dasypogon) in Platform Coral (Coscinarea macneilli), coral reef, Great Barrier Reef, UNESCO World Heritage Site, Cairns, Queensland, Australia, Pacific, Oceania

Piano Fangblenny or Mimic Blenny (Plagiotremus tapeinosoma) peeping out of hole in a coral, coral reef, 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

Scuba diver with torch watching school of Oriental Sweetlips (Plectorhinchus vittatus, Plectorhinchus orientalis) at coral reef, Great Barrier Reef, UNESCO World Heritage Site, Cairns, Queensland, Australia, Pacific, 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

Aerial view Great Barrier Reef, Queensland, Australia, Oceania

Aerial view Great Barrier Reef, Queensland, Australia, Oceania

Aerial view Great Barrier Reef, Queensland, Australia, Oceania

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

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

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

Maroon Clownfish (Premnas biaculeatus) in sea anemone, Great Barrier Reef, UNESCO World Heritage Site, Cairns, Queensland, Australia, Pacific, Oceania