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A pink anemonefish, Amphiprion perideraion, swims above its beautiful host anemone in Wakatobi National Park, Indonesia.

A large roughtail stingray, Dasyatis centroura, lays on the seagrass-covered seafloor of Turneffe Atoll off the coast of Belize. This reef is part of the massive Mesoamerican Reef System in the Caribbean Sea, the second largest barrier reef on Earth.

A beautiful coral reef thrives in Komodo National Park, Indonesia. This tropical area in the Lesser Sunda Islands is known for both its amazing marine biodiversity as well its infamous dragons.

Symbiotic anemones cover the shell of a hermit crab, Dardanus pedunculatus, in Komodo National Park, Indonesia. This tropical area in the Lesser Sunda Islands is known for both its amazing marine biodiversity as well its infamous dragons.

A hawksbill sea turtle, Eretmochelys imbricata, lays on a beautiful reef in Komodo National Park, Indonesia. This tropical area in the Lesser Sunda Islands is known for both its amazing marine biodiversity as well its infamous dragons.

A magnificent sea anemone, Heteractis magnifica, grows on a reef in Komodo National Park, Indonesia. This tropical area in the Lesser Sunda Islands is known for both its amazing marine biodiversity as well its infamous dragons.

A colorful nudibranch, Hypselodoris tryoni, crawls across a sandy sea floor in Komodo National Park, Indonesia. This tropical area in the Lesser Sunda Islands is known for both its amazing marine biodiversity as well its infamous dragons.

A bleached magnificent sea anemone is found on a reef off the coast of Sulawesi in Indonesia. Bleaching is usually associated with higher than normal sea temperatures.

A juvenile painted spiny lobster, Panulirus versicolor, inhabits a crevice on a reef amid the tropical islands of Raja Ampat, Indonesia.

A huge whale shark, Rhincodon typus, swims in sunlit Indonesian waters. This massive yet harmless shark feeds on planktonic organisms and can sometimes be found swimming near fishing platforms due to the scent of fish.

A well-camouflaged flasher scorpionfish, Scorpaenopsis macrochir, lies on a black sand slope just outside of Komodo National Park, Indonesia.

A huge whale shark, Rhincodon typus, swims in sunlit Indonesian waters. This massive yet harmless shark feeds on planktonic organisms and can sometimes be found swimming near fishing platforms due to the scent of fish.

Detail of a bulbed anemone, Entacmaea quadricolor, on a coral reef in Komodo National Park, Indonesia.

Perito Moreno Glacier, UNESCO World Heritage Site, around El Calafate, Santa Cruz province, Patagonia, Argentina, South America

Perito Moreno Glacier, UNESCO World Heritage Site, around El Calafate, Santa Cruz province, Patagonia, Argentina, South America

Flock of sheep, Estancia Nibepo Aike on the Argentino lakeshore, around El Calafate, Patagonia, Argentina, South America

Mushroom shaped sandstone spire on an eroded ridge west of Hamilili Point in Petrified Forest National Park, Arizona, United States of America, North America

Views of the cemetery at the abandoned whaling station in Stromness Bay on South Georgia in the Southern Ocean, Polar Regions

Landscape view of a river and mountain in the background covered in snow during winter, Italy, Europe

Man in yellow rain coat looking at Mountain Pass,glacial mountains and melt water lakes, Jotunheimen National Park, Norway, Scandinavia, Europe

Glacial mountains with melt water lakes, Sognefjellet Mountain Pass, Jotunheimen National Park, Norway, Scandinavia, Europe

Drone view of Kok-Moinok Canyon, a clay-sand structure formed on the slopes of arid mountains cut by water streams, Kyrgyzstan, Central Asia, Asia

Kok-Moinok Canyon, a clay-sand structure formed on the slopes of arid mountains cut by water streams, Kyrgyzstan, Central Asia, Asia

A view of the upper and lower Mitchell Bay waterfalls, Kimberley, Western Australia, Australia, Pacific

View of tidewater glacier cave found deep inside Neko Harbor on the western side of the Antarctic Peninsula, Polar Regions

Dramatic Sea Arch of Drangarnir and waves crashing on the Faroe Islands coast, Faroe Islands, Denmark, Atlantic, Europe

Adult American black bear (Ursus americanus) near Mendenhall Glacier, Southeast Alaska, United States of America, North America

Adult brown bear (Ursus arctos) fishing for pink salmon at Pavlof Harbor on Chichagof Island, Southeast Alaska, United States of America, North America

Scenic view of Glacier Bay National Park and Preserve, UNESCO World Heritage Site, Southeast Alaska, Pacific Ocean, United States of America, North America

Views from the fishing town of Petersburg on Mitkof Island at low tide, Southeast Alaska, Pacific Ocean, United States of America, North America

Scenic mountain landscape with lush greenery and snow-capped peaks above Kol Ukok Lake, Kyrgyzstan, Central Asia, Asia

The upper half of the Desert View Watchtower viewed from the observation deck at Grand Canyon South Rim, UNESCO World Heritage Site, Arizona, United States of America, North America

View of sea and coastline near Skala Kallirachis, Skala Kallirachis, Thassos, Aegean Sea, Greek Islands, Greece, Europe

Adult black-legged kittiwake (Rissa tridactyla) in flight near Alexander Island in Franz Josef Land, Russia, Arctic Ocean, Eurasia

Scenic mountain landscape of Kyrgyzstan with lush Greenery and Snow-Capped Peaks overlooking Kol Ukok Lake, Kyrgyzstan, Central Asia, Asia

Ruined cells of penal colony on Ile Saint-Joseph, Iles du Salut (Islands of Salvation), French Guiana, Overseas department and region of France, French Guiana, South America

Towering red rock formations in the Warton Sandstone, King George River, Kimberley, Western Australia, Australia, Pacific

One of the twin 100 meter waterfalls formed in the Warton Sandstone, King George River, Kimberley, Western Australia, Australia, Pacific

Alpine forest with towering mountains of the Italian Alps at Monte Rosa, Alagna Valsesia, Piedmont, Italy, Europe

Beautiful idyllic hiking trail in the early morning sun light with mountain chain in the background, Monte Rosa, Piedmont, Italian Alps, Italy, Europe

Views of Austfonna, an ice cap located on Nordaustlandet in the Svalbard archipelago in Norway, Arctic, Europe

A curious young polar bear (Ursus maritimus) on the ice in the Svalbard Archipelago, Norway, Arctic, Europe

An adult polar bear (Ursus maritimus) on ice floe under bright sun burst in the Svalbard Archipelago, Norway, Arctic, Europe

Ferry service on the Aurlandsfjord, an arm of the Sognefjord, the largest fjord in all of Norway, Vestland, Norway, Scandinavia, Europe

Adult great blue heron (Ardea herodias cognata) hunting for green sea turtle hatchlings in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

A view of the Mitchell River meandering towards Swift Bay as seen from a commercial helicopter, Kimberley, Western Australia, Australia, Pacific

A view of the Mitchell River meandering towards Swift Bay as seen from a commercial helicopter, Kimberley, Western Australia, Australia, Pacific

Guest from the Lindblad Expedition ship National Geographic Explorer photographing soda straw ice in the Svalbard Archipelago, Norway, Arctic, Europe

The Lindblad Expedition ship National Geographic Explorer running Zodiac operations in the Svalbard Archipelago, Norway, Arctic, Europe

Zodiac with Lindblad guests near harbor seal (Phoca vitulina) hauled out on ice calved from the South Sawyer Glacier in the Tracy Arm-Ford's Terror Wilderness area, Southeast Alaska, United States of America, North America

Weddell Seal (Leptonychotes weddellii), hauled out on ice at Half Moon Island, Antarctica, Southern Ocean, Polar Regions

View over the Ilulissat Icefjord, UNESCO World Heritage Site, Western Greenland, Denmark, Polar Regions

Kayakers between the floating icebergs, Ilulissat Icefjord, UNESCO World Heritage Site, Western Greenland, Denmark, Polar Regions

Floating icebergs, Ilulissat Icefjord, UNESCO World Heritage Site, Western Greenland, Denmark, Polar Regions

Aerial of the Ilulissat Icefjord, UNESCO World Heritage Site, Western Greenland, Denmark, Polar Regions