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A huge bull shark with accompanying remora and schooling giant trevally, Fiji.
National Museum of Qatar, Doha, Qatar, Middle East
National Museum of Qatar, Doha, Qatar, Middle East
Hawksbill sea turtle (Eretmochelys imbricata), a critically endangered species, feeding on soft coral, side view, South Ari Atoll, Maldives.
Hawksbill sea turtle (Eretmochelys imbricata), a critically endangered species, frontal view, South Ari Atoll, Maldives.
A trio of reef manta rays (Mobula alfredi) swimming above a reef top, Komodo National Park, Indonesia.
A green turtle (Chelonia mydas) swimming in Komodo National Park, Indonesia.
December 3, 2012 - Colourful crater lakes of Kelimutu volcano, Flores Island, Indonesia. Tiwu Nua Muri Kofah (Lake of Young Men and Maidens) and Tiwu Ata Polo (Bewitched Lake). The two lakes are highly acidic due to underwater fumarole activity and are turqoise in colour.
December 3, 2012 - Colourful crater lakes of Kelimutu volcano, Flores Island, Indonesia. A crater wall separates Tiwu Nua Muri Koo Fai (Lake of Young Men and Maidens) and Tiwu Ata Polo (Bewitched Lake). The two lakes are highly acidic due to underwater fumarole activity and are turqoise in colour.
September 12, 2009 - Sawmill Geyser, Upper Geyser Basin geothermal area, Yellowstone Caldera, Yellowstone National Park, Wyoming.
September 12, 2009 - Chromatic Pool Hot Spring, Upper Geyser Basin geothermal area, Yellowstone Caldera, Yellowstone National Park, Wyoming.
September 12, 2009 - Morning Glory Pool Hot Spring, Upper Geyser Basin geothermal area, Yellowstone Caldera, Yellowstone National Park, Wyoming.
September 12, 2009 - Chromatic Pool Hot Spring, Upper Geyser Basin geothermal area, Yellowstone Caldera, Yellowstone National Park, Wyoming.
A Red Sail Junk in Hong Kong Harbour, Hong Kong, Special Administrative Region of the People's Republic of China, China, Asia
September 11, 2009 - White Dome Geyser erupting, Lower Geyser Basin geothermal area, Yellowstone Caldera, Yellowstone National Park, Wyoming.
November 2007 - Champagne Pool hot spring, Wai-O-Tapu Geothermal area, Taupo Volcanic Zone, New Zealand.
November 2007 - Orange coloration in Champagne Pool hot spring, Wai-O-Tapu Geothermal area, Taupo Volcanic Zone, New Zealand.
November 2007 - Bubbles rising in Champagne Pool hot spring, Wai-O-Tapu Geothermal area, Taupo Volcanic Zone, New Zealand.
November 2007 - Champagne Pool and Artist's Palette, Wai-O-Tapu Geothermal area, Taupo Volcanic Zone, New Zealand.
February 10, 2008 - Dallol geothermal area, brine hot springs, Danakil Depression, Ethiopia.
January 27, 2011 - Dallol geothermal area, potassium salt deposits formed by brine hot springs, Danakil Depression, Ethiopia.
Old town of Rovinj mirroring in the water, Istria, Croatia
January 27, 2011 - Dallol geothermal area, potassium salt deposits formed by brine hot springs, Danakil Depression, Ethiopia.
January 27, 2011 - Dallol geothermal area, potassium salt deposits formed by brine hot springs, Danakil Depression, Ethiopia.
January 27, 2011 - Dallol geothermal area, potassium salt deposits formed by brine hot springs, Danakil Depression, Ethiopia.
January 27, 2011 - Dallol geothermal area, potassium salt deposits formed by brine hot springs, Danakil Depression, Ethiopia.
January 27, 2011 - Dallol geothermal area, terraces, potassium salt deposits formed by brine hot springs, Danakil Depression, Ethiopia.
January 27, 2011 - Dallol geothermal area, potassium salt deposits formed by brine hot springs, Danakil Depression, Ethiopia.
Enormous whale shark (Rhincodon typus) in clear blue water with sunrays, Christmas Island, Australia.
Head-on portrait of purple anthias (Pseudanthias tuka) in black water, Manado, North Sulawesi, Indonesia.
Large pink jellyfish silhouetted against the sunrays in clear blue water, Aur Island, Malaysia.
Submerged Buddha statue in Tulamben, Bali, Indonesia.
Large Napoleon wrasse in blue water, Palau, Micronesia.
Whale shark swimming under a boat, with sharp sunrays cutting through the water, Cenderawasih Bay, West Papua, Indonesia.
African elephant (Loxodonta africana) at waterhole, Nxai Pan National Park, Botswana, Africa
American saltwater crocodile (Crocodylus acutus) in mangrove with mouth open showing teeth, Jardines De La Reina, Cuba.
A large whale shark under a bagan, siphoning water from the surface, with sunrays shining in the water, Cenderawasih Bay, West Papua, Indonesia.
Whale shark, Ari and Male Atoll, Maldives.
Whale shark reflected on surface with scuba diver in the distance, Christmas Island, Australia.
School of jacks at Liberty Wreck, Bali, Indonesia.
Red grouper with open mouth and cleaner wrasse, Bali, Indonesia.
School of jacks and divers at Liberty Wreck, Bali, Indonesia.
Pair of red gobies on blue tunicate with eggs, Bali, Indonesia.
Orange gorgonian sea fan, Christmas Island, Australia.
Mimic octopus parachuting down, Lembeh Strait, North Sulawesi, Indonesia.
Map pufferfish with red cleaner shrimp, Bali, Indonesia.
Iceberg swimming pool, Antarctica.
Gold-speck jawfish mouth wide open, Lembeh Strait, Bitung, North Sulawesi, Indonesia.
Giant Grouper, Great Barrier Reef, Queensland, Australia.
Giant Grouper, Great Barrier Reef, Queensland, Australia.
During the preparation for an ice dive, a chainsaw is working its way through the ice. This picture is from the underside of the ice in a flooded limestone quarry in Karlstrup, Denmark.
Whale Shark feeding off coast of Isla Mujeres, Mexico.
Whale Shark feeding off coast of Isla Mujeres, Mexico.
Divers visit the wreck of the Pelicano which sits on the bottom of the Caribbean Sea near Playa Del Carmen, Mexico.
A cavern diver ascends into the light filtering into cenote system at Yucatan Peninsula, Mexico.
Two scuba divers in the Garden of Eden cavern part of the cenote system on the Yucatan Peninsula of Mexico.
Cavern divers enter cenote system in Mexico's Yucatan Peninsula.
Adelie penguins on ice with dark skies, Antarctica, Polar Regions
Upside down jellyfish in Caribbean Sea.
Whale Shark off coast of Isla Mujeres, Mexico.
Hawksbill Sea Turtle in mid-water in the Caribbean Sea.
Snorkeler photographing Green Turtle in Caribbean Sea near Cancun Mexico.
Scuba diver in the Garden of Eden cavern part of the cenote system on the Yucatan Peninsula of Mexico.
Aurora Borealis, Kathleen Lake, Yukon, Canada.
Aurora borealis over Nares Lake, Carcross, Yukon, Canada.
Aerial of a traditional Dhow on a white sand beach, Goa island near the Island of Mozambique, Mozambique, Africa
Red aurora borealis, shooting star, and Milky Way over Carcross Desert, Carcross, Yukon, Canada.
Aurora borealis over Fish lake, Whitehorse, Yukon, Canada.
Aurora borealis over Fish lake, Whitehorse, Yukon, Canada.
Aurora borealis and Full Moon over the Yukon River, with Pleiades, Whitehorse, Yukon, Canada.
Aurora borealis and Full Moon over the Yukon River, Whitehorse, Yukon, Canada.
Northern lights over Hvitserkur, a spectacular rock formation in Iceland.
Hikers on Rabacal levada walk towards the 25 Fountains cirque, Madeira island, Atlantic Ocean, Portugal
Fishing village (Lofoten Islands), Norway.
Bigeye Trevally (Caranx sexfasciatus), schooling in Cabo Pulmo National Marine Park, Baja California Sur, Mexico, North America
Aerial of the Ardeche Gorge (Gorges de l'Ardeche), Ardeche, Auvergne-Rhone-Alpes, France, Europe
Bigeye Trevally (Caranx sexfasciatus), schooling in Cabo Pulmo National Marine Park, Baja California Sur, Mexico, North America
Tenby's harbour, Carmarthen Bay, Tenby, Pembrokeshire, south-west Wales, United Kingdom
Person admiring the starry sky outside tent pitched on the shore of Cheserys lake surrounded by alpine landscape of Mont Blanc, Chamonix, Haute Savoie, French Alps, France, Europe
Hot Springs at the Langarice Canyon, Vjosa (Vjose) River, Albania, Europe
Sunset at Drangarnir, the famous sea stack in Vagar island, Faroe Islands, Denmark, North Atlantic, Europe
Aerial view, Alyki beach, Thassos Island, Greek Islands, Greece, Europe
Vernazza, a coastal town in the province of La Spezia, Cinque Terre region, UNESCO World Heritage Site, Liguria, Italy, Europe
Vernazza, a coastal town in the province of La Spezia, Cinque Terre region, UNESCO World Heritage Site, Liguria, Italy, Europe
Vernazza, a coastal town in the province of La Spezia, Cinque Terre region, UNESCO World Heritage Site, Liguria, Italy, Europe
Tour boat leaving Kicker Rock, near San Cristobal Island, in the Galapagos, UNESCO World Heritage Site, Ecuador, South America
Two tourists approach Vernazza, a coastal town in the province of La Spezia, Cinque Terre region, UNESCO World Heritage Site, Liguria, Italy, Europe
Aerial of the seaside town of Menton, Alpes Maritimes, Provence-Alpes-Cote d'Azur, French Riviera, France, Europe
Bull southern elephant seal (Mirounga leonina) on South Georgia Island, Southern Ocean
A rocky shore at low tide and under grey skies; at Welcombe Mouth, Hartland, north Devon, England, United Kingdom, Europe
Waterfall pouring down a rocky cliff, with blurred motion, resulting from a slow shutter speed; at Welcombe Mouth, Hartland, north Devon, England, United Kingdom, Europe
Playa Cabeza de Toro, Punta Cana, Dominican Republic, West Indies, Caribbean, Central America
Doha Skyline and Traditional Dhow, Doha, Qatar, Middle East
Toy boats for hire, Jardin du Luxembourg, Paris, France
Young adult bull southern elephant seal (Mirounga leonina) holding young pup's head underwater trying to kill it, South Georgia Island, Southern Ocean
Greenland Lake reduced to a mud hole, Grand Canyon North Rim, UNESCO, Arizona, United States of America
Interior of Museum of Islamic Art, Doha, Qatar, Middle East
Chinstrap penguin (Pygoscelis antarctica) porpoising in Cooper Bay, South Georgia
Chinstrap penguin (Pygoscelis antarctica) porpoising in Cooper Bay, South Georgia
A stunning panoramic 360° view of Song Kol lake at sunrise, Kyrgyzstan