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Hippopotamuses (Hippopotamus amphibius) in the river Khwai, Okavango Delta, Botswana, Africa
Nurse sharks (Ginglymostoma cirratum), being fed in shark and ray alley, Caye Caulker, Mesoamerican Barrier Reef, Belize
Southern stingray (Hypanus americanus) over sand in shark and ray alley, Caye Caulker, Mesoamerican Barrier Reef, Belize
Green sea turtle (Chelonia mydas), feeding on the sand near Caye Caulker, inside the Mesoamerican Barrier Reef, Belize
Green sea turtle (Chelonia mydas), surfacing for air near Caye Caulker, inside the Mesoamerican Barrier Reef, Belize
Green sea turtle (Chelonia mydas), surfacing for air near Caye Caulker, inside the Mesoamerican Barrier Reef, Belize
Green sea turtle (Chelonia mydas), surfacing for air near Caye Caulker, inside the Mesoamerican Barrier Reef, Belize
Green sea turtle (Chelonia mydas), with snorkeler near Caye Caulker, inside the Mesoamerican Barrier Reef, Belize
Northern (Steller) sea lion (Eumetopias jubatus) fishing on the flood tide in Inian Pass, Southeastern Alaska, United States of America
Adult sea otter (Enhydra lutris kenyoni) mother and pup in Inian Pass, Southeastern Alaska, United States of America
Adult sea otter (Enhydra lutris kenyoni) mother and pup in Inian Pass, Southeastern Alaska, United States of America
Adult sea otter (Enhydra lutris kenyoni) in kelp bed in Inian Pass, Southeastern Alaska, United States of America
Adult sea otter (Enhydra lutris kenyoni) in kelp bed in Inian Pass, Southeastern Alaska, United States of America
Gathering of at least two resident pods of killer whales (Orcinus orca) encountered near sunset, Johnstone Strait, British Columbia, Canada
Adult brown bear (Ursus arctos) foraging for salmon at the Brooks River, Katmai National Park, Alaska, United States of America
Adult brown bears (Ursus arctos) foraging for salmon at the Brooks River, Katmai National Park, Alaska, United States of America
Adult brown bear (Ursus arctos) foraging for salmon at the Brooks River, Katmai National Park, Alaska, United States of America
A curious Antarctic minke whale (Balaenoptera bonaerensis) in Neko Harbor, Antarctica, Polar Regions
Adult white-beaked dolphin (Lagenorhynchus albirostris) surfacing in the Svalbard Archipelago, Norway
Transient killer whale (Orcinus orca), near whale watching boat, Monterey Bay National Marine Sanctuary, California, United States of America, North America
Adult Eurasian Wigeon (Anas penelope) in breeding plumage on Lake Myvatn, Iceland
Adult harlequin duck (Histrionicus histrionicus) in full breeding plumage in the calm waters of Lake Myvatn, Iceland
Adult humpback whale (Megaptera novaeangliae), head-lunging in the fjord of Isfjardardjup, Iceland
Adult red-necked phalarope (Phalaropus lobatus) in breeding plumage on Flatey Island, Iceland
Adult red-necked phalarope (Phalaropus lobatus) in breeding plumage on Flatey Island, Iceland
Curious harbor seal (Phoca vitulina), approaches Zodiac at Vigur Island, Iceland
Indo-Pacific bottlenose dolphin (Tursiops aduncus) socializing and feeding at night in Yampi Bay, Kimberley, Western Australia, Australia, Pacific
An adult wild saltwater crocodile (Crocodylus porosus) hunting on the banks of the Hunter River in Mitchell River National Park, Kimberley, Western Australia, Australia, Pacific
A school of bigeye trevally (Caranx sexfasciatus), Sebayur Island, Komodo Island National Park, Indonesia, Southeast Asia, Asia
Southern elephant seal pups (Mirounga leonina), in melt water pond, St. Andrews Bay, South Georgia, Polar Regions
Juvenile Galapagos sea lion (Zalophus wollebaeki) underwater on Rabida Island, Galapagos, Ecuador, South America
Hippo (Hippopotamus amphibius), Chobe River, Botswana, Africa
Short-finned pilot whale (Globicephala macrorhynchus), underwater off Isla San Marcos, Baja California Sur, Mexico, North America
Curious California sea lions (Zalophus californianus), underwater at Los Islotes, Baja California Sur, Mexico, North America
Crocodile smimming in the Black River, Saint Elizabeth Parish, Jamaica, West Indies, Caribbean, Central America
Adult bottlenose dolphins (Tursiops truncatus), flukes-up diving in Bahia Magdalena, Baja California Sur, Mexico, North America
A young whale shark (Rhincodon typus), near kayaker in Bahia Coyote, Conception Bay, Baja California Sur, Mexico, North America
A young whale shark (Rhincodon typus), near kayaker in Bahia Coyote, Conception Bay, Baja California Sur, Mexico, North America
Adult fin whale (Balaenoptera physalus), feeding on krill near Coronation Island, South Orkney Islands, Antarctica, Polar Regions
Curious type B2 killer whales (Orcinus orca), mother and calf inspecting the ship in the Errera Channel, Antarctica, Polar Regions
Adult South Georgia pintail (Anas georgica georgica), swimming in a freshwater pond, Moltke Harbor, South Georgia, South Atlantic, Polar Regions
Adult whale shark (Rhincodon typus), underwater on Ningaloo Reef, Western Australia, Australia, Pacific
Humpback whales (Megaptera novaeangliae), swimming underwater on Ningaloo Reef, Western Australia, Australia, Pacific
Hippo in Motlhabatsi River, Marataba, Marakele National Park, South Africa, Africa
Snow Monkeys at Snow Monkey Park, Jigokudani, Nagano Prefecture, Honshu, Japan, Asia
Snow Monkeys at Snow Monkey Park, Jigokudani, Nagano Prefecture, Honshu, Japan, Asia
Female Mallard Duck (Anas platyrhynchos), East Sussex, England, United Kingdom, Europe
Two swans swim in the frozen lake during an amazing winter sunrise in Muonio, Finland, Europe
Four trumpeter swans (Cygnus buccinator), on the river with reflection, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Clown Anemonefish, Indonesia.
A hawksbill sea turtle swims over a coral reef in Palau. This is an endangered species often hunted for its shell and meat.
A Caribbean electric ray (Narcine bancroftii) lays on the sandy seafloor of Turneffe Atoll off the coast of Belize in the Caribbean Sea. This ray can generate strong electric discharges used to defend themselves or to stun prey.
A lionfish (Pterois volitans) swims along the edge of a beautiful reef in Wakatobi National Park, Indonesia. This remote region is known for its incredible marine biodiversity and gorgeous reefs.
A sleek blue shark (Prionace glauca) cruises through the cold waters off Cape Cod, Massachusetts, in the Atlantic Ocean. These beautiful elasmobranchs are found throughout the world in both temperate and tropical seas and are a species listed as Near Thre
A sleek blue shark (Prionace glauca) cruises through the cold waters off Cape Cod, Massachusetts, in the Atlantic Ocean. These beautiful elasmobranchs are found throughout the world in both temperate and tropical seas and are a species listed as Near Thre
A snorkeler swims above a beautiful reef near Alor in the Lesser Sunda Islands of Indonesia.
Colorful reef fish, mainly Scalefin anthias (Pseudanthias squamipinnis), swim in a strong current near Alor in the Lesser Sunda Islands of Indonesia.
A large banded sea snake, Laticauda colubrina, sinuously swims over a beautiful reef in Wakatobi National Park, Indonesia.
A spinner dolphin, Stenella longirostris, gracefully glides through the clear, blue waters of the Pantar Strait near Alor in Indonesia.
An unidentified sea snake hunts in a shallow seagrass meadow in Wakatobi National Park, Indonesia.
A magnificent humpback whale, Megaptera novaeangliae, swims in the clear, blue waters of the Caribbean Sea.
A beautiful coral reef thrives in a remote part of Raja Ampat, Indonesia.
A false clownfish, Amphiprion ocellaris, swims among the tentacles of its host anemone in Raja Ampat, Indonesia.
A well-camouflaged ornate ghost pipefish, Solenostomus paradoxus, hovers over a reef in Komodo National Park, Indonesia.
A colorful warty frogfish, Antennarius maculatus, yawns as it waits for prey to swim close by in Komodo National Park, Indonesia.
A colorful warty frogfish, Antennarius maculatus, yawns as it waits for prey to swim close by in Komodo National Park, Indonesia.
A beautiful coral reef thrives in shallow water in Indonesia's Ceram Sea.
A beautiful coral reef thrives in shallow water in Indonesia's Banda Sea. This part of eastern Indonesia is home to part of the world's greatest marine biodiversity.
A silky shark swims against a school of black jacks, Socorro Island, Mexico.
A lionfish takes up residence on the deck of the Yamagiri Maru, in the Pacific Ocean, Micronesia.
Reef squid swimming, Anilao, Philippines.
Striped catfish swim in schools feeding one in front of the other, Anilao, Philippines.
A school of fish with a few stragglers catching up to the school, Raja Ampat, Indonesia.
A pod of spinner dolphins plays near the surface of Red Sea.
Several anemonefish wait outside while their anemone host closes up to feed, Raja Ampat, Indonesia.
Several pink anemones cluster on top of a coral outcropping providing homes for several anemone fish, Maldives.
A reef manta ray (Mobula alfredi), hovers over a reef where small cleaner wrasse will relieve her of her parasites, Maldives.
A green sea turtle pauses from eating sea grass to gaze up at its surroundings, Red Sea.
Adult Peale's Dolphin (Lagenorhynchus australis), bow-riding near New Island in the Falkland Islands, South America
A young killer whale (Orcinus orca) surfacing in Glacier Bay National Park, Southeast Alaska, United States of America, Pacific Ocean, North America
Reef shark (Carcharhinus perezii) with a school of silversides, herrings and anchovies, Cuba.
Saltwater crocodile of Cuba.
Saltwater crocodile of Cuba.
School of Jacks in motion, Belize.
School of Jacks, Indonesia.
Clownfish in green anemone, Indonesia.
Black Anemonefish, Fiji.
Great white shark and divers, Guadalupe Island, Mexico.
Underwater photographer taking a photograph of a male great white shark, Guadalupe Island, Mexico.
Guadalupe fur seals (Arctocephalus townsendi), underwater on Las Animas Island, Baja California Sur, Sea of Cortez, Mexico, North America
Mute swan resting on Livadi beach, Serifos Island, Cyclades, Greek Islands, Greece, Europe
Adult gentoo penguins (Pygoscelis papua), returning and coming from the sea at Booth Island, Antarctica, Southern Ocean, Polar Regions
Adult Commerson's dolphin (Cephalorhynchus commersonii), surfacing in Stanley Harbor in the Falkland Islands, South America
Guadalupe fur seal (Arctocephalus townsendi), underwater on Las Animas Island, Baja California Sur, Sea of Cortez, Mexico, North America
Adult fin whale (Balaenoptera physalus), dorsal fin detail surfacing off Newport Beach, California, United States of America, North America
Adult California gray whale (Eschrictius robustus), surfacing near boat in San Ignacio Lagoon, Baja California, Mexico, North America
Adult California gray whales (Eschrictius robustus), spy-hopping in San Ignacio Lagoon, Baja California, Mexico, North America
Bigeye Trevally (Caranx sexfasciatus), schooling in Cabo Pulmo National Marine Park, Baja California Sur, Mexico, North America
Bull southern elephant seal (Mirounga leonina) on South Georgia Island, Southern Ocean
Humpback whale slapping tail with Antarctic background, Antarctica, Polar Regions