Aerial view of One Tree Island and reef, with Wistari Reef, Heron Island Reef and Sykes Reef visible in background. One Tree Island is a small coral cay located near the Tropic of Capricorn, Sth Great Barrier Reef, Australia. Note Red Tide Algal Bloom. © Gary Bell / OceanwideImages.com
Aerial view of One Tree Island and reef, with Wistari Reef, Heron Island Reef and Sykes Reef visible in background. One Tree Island is a small coral cay located near the Tropic of Capricorn, Sth Great Barrier Reef, Australia. Note Ret Tide Algal Bloom. © Gary Bell / OceanwideImages.com
Aerial view of One Tree Island and reef lagoon, with Research Station visible. One Tree Island is a small coral cay located near the Tropic of Capricorn in the southern Great Barrier Reef, Australia, and part of the Capricorn group of Islands. © Gary Bell / OceanwideImages.com
Aerial view of One Tree Island and reef lagoon, with Research Station visible. One Tree Island is a small coral cay located near the Tropic of Capricorn in the southern Great Barrier Reef, Australia, and part of the Capricorn group of Islands. © Gary Bell / OceanwideImages.com
Aerial view of One Tree Island and reef lagoon, with Research Station visible. One Tree Island is a small coral cay located near the Tropic of Capricorn in the southern Great Barrier Reef, Australia, and part of the Capricorn group of Islands. © Gary Bell / OceanwideImages.com
Aerial view of One Tree Island and reef lagoon, with Research Station visible. One Tree Island is a small coral cay located near the Tropic of Capricorn in the southern Great Barrier Reef, Australia, and part of the Capricorn group of Islands. © Gary Bell / OceanwideImages.com
Aerial view of One Tree Island and reef lagoon, with Research Station visible. One Tree Island is a small coral cay located near the Tropic of Capricorn in the southern Great Barrier Reef, Australia, and part of the Capricorn group of Islands. © Gary Bell / OceanwideImages.com
Red Tide drifting close to One Tree Island reef, located near the Tropic of Capricorn in the southern Great Barrier Reef, Australia. Red Tide is a common name given to algal bloom of toxic, naturally occurring microscopic plankton known as Dinoflagelates. © Gary Bell / OceanwideImages.com
Red Tide drifting close to One Tree Island reef, located near the Tropic of Capricorn in the southern Great Barrier Reef, Australia. Red Tide is a common name given to algal bloom of toxic, naturally occurring microscopic plankton known as Dinoflagelates. © Gary Bell / OceanwideImages.com
Red Tide drifting close to One Tree Island reef, located near the Tropic of Capricorn in the southern Great Barrier Reef, Australia. Red Tide is a common name given to algal bloom of toxic, naturally occurring microscopic plankton known as Dinoflagelates. © Gary Bell / OceanwideImages.com
Red Tide drifting close to One Tree Island reef, located near the Tropic of Capricorn in the southern Great Barrier Reef, Australia. Red Tide is a common name given to algal bloom of toxic, naturally occurring microscopic plankton known as Dinoflagelates. © Gary Bell / OceanwideImages.com
Red Tide drifting close to One Tree Island reef, located near the Tropic of Capricorn in the southern Great Barrier Reef, Australia. Red Tide is a common name given to algal bloom of toxic, naturally occurring microscopic plankton known as Dinoflagelates. © Gary Bell / OceanwideImages.com
Red Tide drifting through Great Barrier Reef waters, Australia. Red Tide is a common name given to an algal bloom of toxic, naturally occurring microscopic plankton known as Dinoflagelates. © Gary Bell / OceanwideImages.com
Red Tide drifting close to One Tree Island reef, located near the Tropic of Capricorn in the southern Great Barrier Reef, Australia. Red Tide is a common name given to algal bloom of toxic, naturally occurring microscopic plankton known as Dinoflagelates. © Gary Bell / OceanwideImages.com
Red Tide drifting close to One Tree Island reef, located near the Tropic of Capricorn in the southern Great Barrier Reef, Australia. Red Tide is a common name given to algal bloom of toxic, naturally occurring microscopic plankton known as Dinoflagelates. © Gary Bell / OceanwideImages.com
Red Tide drifting through Great Barrier Reef waters, Australia. Red Tide is a common name given to an algal bloom of toxic, naturally occurring microscopic plankton known as Dinoflagelates. © Gary Bell / OceanwideImages.com
Red Tide drifting close to One Tree Island reef, located near the Tropic of Capricorn in the southern Great Barrier Reef, Australia. Red Tide is a common name given to algal bloom of toxic, naturally occurring microscopic plankton known as Dinoflagelates. © Gary Bell / OceanwideImages.com
Red Tide drifting through Great Barrier Reef waters, Australia. Red Tide is a common name given to an algal bloom of toxic, naturally occurring microscopic plankton known as Dinoflagelates. © Gary Bell / OceanwideImages.com
Red Tide drifting close to Heron Island reef, located near the Tropic of Capricorn in the southern Great Barrier Reef, Australia. Red Tide is a common name given to an algal bloom of toxic, naturally occurring microscopic plankton known as Dinoflagelates. © Gary Bell / OceanwideImages.com
Red Tide drifting close to Heron Island reef, located near the Tropic of Capricorn in the southern Great Barrier Reef, Australia. Red Tide is a common name given to an algal bloom of toxic, naturally occurring microscopic plankton known as Dinoflagelates. © Gary Bell / OceanwideImages.com
Red Tide drifting close to Heron Island reef, located near the Tropic of Capricorn in the southern Great Barrier Reef, Australia. Red Tide is a common name given to an algal bloom of toxic, naturally occurring microscopic plankton known as Dinoflagelates. © Gary Bell / OceanwideImages.com
Red Tide drifting close to Heron Island reef, located near the Tropic of Capricorn in the southern Great Barrier Reef, Australia. Red Tide is a common name given to an algal bloom of toxic, naturally occurring microscopic plankton known as Dinoflagelates. © Gary Bell / OceanwideImages.com
Red Tide drifting close to Heron Island reef, located near the Tropic of Capricorn in the southern Great Barrier Reef, Australia. Red Tide is a common name given to an algal bloom of toxic, naturally occurring microscopic plankton known as Dinoflagelates. © Gary Bell / OceanwideImages.com
Aerial view of Heron Island and reef, with Wistari Reef visible in background. Heron Island is a small coral cay located near the Tropic of Capricorn in the southern Great Barrier Reef, Australia, and part of the Capricorn group of Islands. © Gary Bell / OceanwideImages.com
Aerial view of Heron Island and reef, with a Red Tide algal bloom fringing the reef. Heron Island is a small coral cay located near the Tropic of Capricorn in the southern Great Barrier Reef, Australia, and part of the Capricorn group of Islands. © Gary Bell / OceanwideImages.com
Aerial view of Heron Island and reef, with Wistari Reef visible in background. Heron Island is a small coral cay located near the Tropic of Capricorn in the southern Great Barrier Reef, Australia, and part of the Capricorn group of Islands. © Gary Bell / OceanwideImages.com
Aerial view of Heron Island and reef, with a Red Tide algal bloom fringing the reef. Heron Island is a small coral cay located near the Tropic of Capricorn in the southern Great Barrier Reef, Australia, and part of the Capricorn group of Islands. © Gary Bell / OceanwideImages.com
Aerial view of Heron Island, showing retaining rock wall to stop erosion. Heron Island is a small coral cay located near the Tropic of Capricorn in the southern Great Barrier Reef, Australia, and part of the Capricorn group of Islands. © Gary Bell / OceanwideImages.com
Aerial view of Heron Island and reef. Heron Island is a small coral cay located near the Tropic of Capricorn in the southern Great Barrier Reef, Australia, and part of the Capricorn group of Islands. © Gary Bell / OceanwideImages.com
Aerial view of Heron Island and reef, showing Wistari Reef at the right. Heron Island is a small coral cay located near the Tropic of Capricorn in the southern Great Barrier Reef, Australia, and part of the Capricorn group of Islands. © Gary Bell / OceanwideImages.com
Aerial view of Wistari Reef lagoon. Wistari Reef is located near the Tropic of Capricorn in the southern Great Barrier Reef, Australia, and part of the Capricorn group of reefs. © Gary Bell / OceanwideImages.com
Aerial view of Wistari Reef lagoon. Wistari Reef is located near the Tropic of Capricorn in the southern Great Barrier Reef, Australia, and part of the Capricorn group of reefs. © Gary Bell / OceanwideImages.com
Aerial view of Wistari Reef lagoon. Wistari Reef is located near the Tropic of Capricorn in the southern Great Barrier Reef, Australia, and part of the Capricorn group of reefs. © Gary Bell / OceanwideImages.com
Aerial view of Wistari Reef lagoon. Wistari Reef is located near the Tropic of Capricorn in the southern Great Barrier Reef, Australia, and part of the Capricorn group of reefs. © Gary Bell / OceanwideImages.com
Aerial view showing detail of Wistari Reef Lagoon. Southern Great Barrier Reef, Queensland, Australia. © Gary Bell / OceanwideImages.com
Aerial view of Wistari Reef Lagoon, with Heron Island Reef in the distance. Southern Great Barrier Reef, Queensland, Australia. © Gary Bell / OceanwideImages.com
Aerial view showing detail of Wistari Reef Lagoon. Southern Great Barrier Reef, Queensland, Australia. © Gary Bell / OceanwideImages.com
Aerial view showing detail of Wistari Reef Lagoon. Southern Great Barrier Reef, Queensland, Australia. © Gary Bell / OceanwideImages.com
Aerial view showing detail of Wistari Reef Lagoon. Southern Great Barrier Reef, Queensland, Australia. © Gary Bell / OceanwideImages.com
Aerial view of Polmaise Reef, Masthead Island Reef, Erskine Island Reef, Wistari Reef, Heron Island Reef and Sykes Reef (showing from foreground to distant background). Capricorn Group, southern Great Barrier Reef, Qld, Australia. © Gary Bell / OceanwideImages.com
Aerial view showing detail of Wistari Reef Lagoon. Southern Great Barrier Reef, Queensland, Australia. © Gary Bell / OceanwideImages.com
Aerial view of Polmaise Reef, Masthead Island Reef, Erskine Island Reef, Wistari Reef, Heron Island Reef and Sykes Reef (showing from foreground to distant background). Capricorn Group, southern Great Barrier Reef, Qld, Australia. © Gary Bell / OceanwideImages.com
Aerial view of Heron Island and reef, showing Wistari Reef in distance. Heron Island is a small coral cay located near the Tropic of Capricorn in the southern Great Barrier Reef, Australia, and part of the Capricorn group of Islands. © Gary Bell / OceanwideImages.com
Aerial view of Heron Island and reef, showing Wistari Reef at the right. Heron Island is a small coral cay located near the Tropic of Capricorn in the southern Great Barrier Reef, Australia, and part of the Capricorn group of Islands. © Gary Bell / OceanwideImages.com
Aerial view of Heron Island and reef, showing Wistari Reef at the right. Heron Island is a small coral cay located near the Tropic of Capricorn in the southern Great Barrier Reef, Australia, and part of the Capricorn group of Islands. © Gary Bell / OceanwideImages.com
Aerial view of Erskine Island Reef. Capricorn Group, southern Great Barrier Reef, Qld, Australia. © Gary Bell / OceanwideImages.com
Aerial view of Masthead Island Reef. Capricorn Group, southern Great Barrier Reef, Qld, Australia. © Gary Bell / OceanwideImages.com
Aerial view of Erskine Island Reef. Capricorn Group, southern Great Barrier Reef, Qld, Australia. © Gary Bell / OceanwideImages.com
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