IUCNweb:
Feather stars thrive on reef edges where the current flow is strong. Photographs courtesy of the Great Barrier Reef Marine Park Authority
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Threadfin butterflyfish amongst soft corals, crinoids and starfish Photographs courtesy of the Great Barrier Reef Marine Park Authority
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Plate coral at Fitzroy Reef Photographs courtesy of the Great Barrier Reef Marine Park Authority
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Dugongs inhabit the Hinchinbrook Channel. Photographs courtesy of the Great Barrier Reef Marine Park Authority
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Weathered rock formations at Nara Inlet, Hook Island Photographs courtesy of the Great Barrier Reef Marine Park Authority
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Unvegetated cays are common on the Great Barrier Reef. (Swain Reefs) Photographs courtesy of the Great Barrier Reef Marine Park Authority
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Continental islands are often surrounded by fringing reefs. (Lizard Island) Photographs courtesy of the Great Barrier Reef Marine Park Authority
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Pipon Island is one of about 45 low-wooded islands, which are a special kind of cay only found north of Cairns. Photographs courtesy of the Great Barrier Reef Marine Park Authority
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Deep natural channels have been carved through the Pompey Complex. Photographs courtesy of the Great Barrier Reef Marine Park Authority
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Sunrise on Heron Island. Photographs courtesy of the Great Barrier Reef Marine Park Authority
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Batfish in the clear blue waters off the Papua New Guinea coast Photographs courtesy of the Great Barrier Reef Marine Park Authority
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An underwater view of the reef around North West Island Photographs courtesy of the Great Barrier Reef Marine Park Authority
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The spectacular colours of a clam Photographs courtesy of the Great Barrier Reef Marine Park Authority
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Recent research suggests that dolphins swimming near the surface at high speed save energy by leaping Photographs courtesy of the Great Barrier Reef Marine Park Authority
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Porites coral releasing eggs and sperm during spawning Photographs courtesy of the Great Barrier Reef Marine Park Authority
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Manta rays are filter-feeders. Photographs courtesy of the Great Barrier Reef Marine Park Authority
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Some parrotfish secrete a veil-like mass of mucus when they sleep at night Photographs courtesy of the Great Barrier Reef Marine Park Authority
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It is a dangerous dash for newborn turtles from their beach nest to the ocean. Photographs courtesy of the Great Barrier Reef Marine Park Authority
IUCNweb:
Photographing a potato cod at the famous 'Cod Hole' near Lizard IslandPhotographs courtesy of the Great Barrier Reef Marine Park Authority