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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 barred-fin moray eel, Gymnothorax zonipectus, is found on a coral reef in Komodo National Park, Indonesia.
A tiny white hairy frogfish, Anilao, Philippines.
A giant jawfish brooding eggs in its mouth, Sea of Cortez, Mexico.
An orangethroat pike blenny (Chaenopsis alepidota), displays its colors in hopes of attracting a mate, Sea of Cortez.
Head-on view of a giant jawfish in the Sea of Cortez.
A finespotted jawfish surrounded by starfish.
This fish is having its gills cleaned by a cleaner wrasse so it opens wide allowing the fish to come in and feed on parasites, Raja Ampat, Indonesia.
A damselfish being eaten by a lizardfish, Anilao, Philippines.
A male yellow barred jawfish (Opistognathus randalli), broods eggs in its mouth, Anilao, Philippines.
Hippopotamus (Hippopotamus amphibius) in the river Khwai, Okavango Delta, Botswana, Africa
Hippopotamuses (Hippopotamus amphibius) in the river Khwai, Okavango Delta, Botswana, Africa
Lion cub, Kruger National Park, South Africa, Africa
Male leopard (Panthera pardus), Phinda game reserve, KwaZulu Natal, South Africa, Africa
South African (Cape) fur seal (Arctocephalus pusillus pusillus), Cape Cross breeding colony, Namibia, May 2013
Nile Crocodile (Crocodylus niloticus) with mouth open, Kruger National Park, South Africa, Africa
Adult female polar bear (Ursus maritimus) yawning with mouth open on multi-year ice floes in Franz Josef Land, Russia, Eurasia
Bull moose (Alces alces), close up with open mouth, Grand Teton National Park, Wyoming, United States of America, North America
Headshot of a fimbriated moray eel (Gymnothorax fimbriatus).
Saltwater crocodile of Cuba.
White-eyed moray eel in Malaysia.
American Alligator (Alligator mississippiensis) split over and under water shot, Florida Everglades, Florida.
Pair of playful sea lions, Los Islotes, La Paz, Mexico.
California sea lion (Zalophus californianus), with photographer at Los Islotes, Baja California Sur, Mexico, North America
Yellow-eyed penguin (Megadyptes antipodes), Moeraki, South Island, New Zealand, Pacific
South American sea lion bull (Otaria flavescens) at breeding colony just outside Ushuaia, Beagle Channel, Argentina, South America
Guadalupe fur seals (Arctocephalus townsendi), at new haul out on Las Animas Island, Baja California Sur, Sea of Cortez, Mexico, North America
Guadalupe fur seals (Arctocephalus townsendi), at new haul out on Las Animas Island, Baja California Sur, Sea of Cortez, Mexico, North America
Crabeater seal with open mouth on ice floe, Antarctica, Polar Regions
Large Nile Crocodile (Crocodylus niloticus), Chobe National Park, Botswana
Goldentail moray eel (Gymnothorax miliaris), in coral reef, Curacao.
Great hammerhead shark with mouth open, Tiger Beach, Bahamas.
Great hammerhead shark with mouth open, Tiger Beach, Bahamas.
A ribbon eel (Rhinomuraena quaesita) in Indonesia.
A reef manta ray (Mobula alfredi) feeding at night in Hawaii.
Close-up view of an angry spotted moray eel, West Palm Beach, Florida.
Toothless green moray eel, Nassau, The Bahamas.
A Spotted Moray Eel (Gymnothorax moringa) displays an open mouth as it protrudes it's head just outside a hole in a coral reef in the Atlantic Ocean off the coast of Key Largo, Florida.
A large spotted pufferfish swims in for a closer look at the photogrpher's camera off the coast of Key Largo, Florida.
A Blue Parrotfish (Scarus coeruleus) swimming up after munching on the coral reef below in the Atlantic Ocean off the coast of Key Largo, Florida.
Dwarf Hawkfish, Papua New Guinea.
Percula Clownfish in its host anemone, Papua New Guinea.
A beautiful Ribbon Eel displays its open mouth to the photographer,Fiji.
A beautiful Ribbon Eel displays its open mouth to the photographer,Fiji.
A beautiful blue ribbon eel displays its open mouth to the photographer, Fiji.
A large Lemon Shark gulps down a large tuna head in front of a crowd of divers, Fiji.
Huge bull shark with mouth open, Fiji.
A Secretary Blenny looks out from its coral home, Bonaire, Caribbean Netherlands.
Close-up view of a Goldentail Moray Eel, Bonaire, Caribbean Netherlands.
Caribbean reef shark swallowing a lionfish, with mouth open and eyelids closed, Jardines De La Reina, Cuba.
Portrait of an American saltwater crocodile on the surface of a mangrove at sunset with mouth wide open, Jardines De La Reina, Cuba.
Whale shark swimming with mouth open, accompanied by fusilier fish, Maldives.
Whale shark coming up from the depths under the boat, mouth wide open, with sharp sunrays cutting through the water.
American saltwater crocodile (Crocodylus acutus) in mangrove with mouth open showing teeth, Jardines De La Reina, Cuba.
Black and white honeycomb moray eel, Australia.
Whale shark, Ari and Male Atoll, Maldives.
Red grouper with open mouth and cleaner wrasse, Bali, Indonesia.
Map pufferfish with red cleaner shrimp, Bali, Indonesia.
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.
Whale Shark feeding off coast of Isla Mujeres, Mexico.
Whale Shark feeding off coast of Isla Mujeres, Mexico.
Nile crocodile (Crocodylus niloticus), jaws agape, Kruger National Park, South Africa, Africa
Hippo (Hippopotamus amphibius), fighting, Kruger National park, Mpumalanga, South Africa, Africa
A young jacare caiman (Caiman yacare), on the river banks of the Rio Tres Irmao, Mato Grosso, Pantanal, Brazil, South America
An adult jacare caiman (Caiman yacare), on the river banks of the Rio Negro, Mato Grosso, Pantanal, Brazil, South America
Columbian ground squirrel (Citellus columbianus) eating, Waterton Lakes National Park, Alberta, Canada, North America
A young jacare caiman (Caiman yacare), on the river banks of the Rio Tres Irmao, Mato Grosso, Pantanal, Brazil, South America
Captive gray wolf (Canis lupus) howling in the snow, near Bozeman, Montana, United States of America, North America
Labrador in field, Oxfordshire, England, United Kingdom, Europe
Gentoo penguin chicks (Pygoscelis papua) in ecstatic display at Brown Bluff, Antarctica, Polar Regions
Crested Gecko (Correlophus Ciliates) in captivity, New Caledonia, Pacific
Grey squirrel (Sciurus carolinensis), in city park, Brandon Park, Bristol, England, United Kingdom, Europe
Hippopotamuses (Hippopotamus amphibius) in the river Khwai, Okavango Delta, Botswana, Africa
Chinese dragon dance at Chinese New Year celebrations, Vietnam, Indochina, Southeast Asia, Asia
Crested Gecko (Correlophus Ciliates), captive, New Caledonia, Pacific
Agonistic behaviour in a tight group of moulting southern elephant seals (Mirounga leonina), Grytviken, South Georgia, Polar Regions
Agonistic behaviour in a tight group of moulting southern elephant seals (Mirounga leonina), Grytviken, South Georgia, Polar Regions
A jacare caiman (Caiman yacare) feeding, Mato Grosso, Brazil, South America
Jacare caimans (Caiman yacare) resting, Mato Grosso, Brazil, South America
Magellanic penguin (Spheniscus magellanicus) pair resting in coastal habitat, Gypsy Cove, Falkland Islands, South America
A jaguar (Panthera onca) walking on a sandy river bank, Mato Grosso, Brazil, South America
African wild dog (African hunting dog) ( Cape hunting dog) (Lycaon pictus) running, Kruger National Park, South Africa, Africa
Hippopotamus (Hippopotamus amphibius), Seronera, Serengeti National Park, Tanzania, East Africa, Africa
Lion cub, Masai Mara, Kenya, East Africa, Africa
Big codfish exposed to protect the structures used for drying this precious product which is exported all over the world from the Lofoten Islands, Arctic, Norway, Scandinavia, Europe
Lion (Panthera leo) demonstrating the flehmen response, Ngorongoro Conservation Area, UNESCO World Heritage Site, Serengeti, Tanzania, East Africa, Africa
Greater kudu (Tragelaphus strepsiceros) buck with his mouth open, Kgalagadi Transfrontier Park encompassing the former Kalahari Gemsbok National Park, South Africa, Africa
Roaring lion (Panthera leo), Kgalagadi Transfrontier Park, Kalahari, Northern Cape, South Africa, Africa
Roaring lion (Panthera leo), Kgalagadi Transfrontier Park, Kalahari, Northern Cape, South Africa, Africa
Yawning hippo (Hippopotamus amphibius), Isimangaliso Greater St. Lucia Wetland Park, UNESCO World Heritage Site, Kwazulu-Natal, South Africa, Africa
Golden eagle (Aquila chrysaetos), Sweden, Scandinavia, Europe
Adult male red howler monkey (Alouatta seniculus), in the village of San Francisco, Amazon Basin, Peru, South America
Magellanic penguin (Spheniscus magellanicus) calling, giving a warning call, Patagonia, Chile, South America
Close up of a cocker spaniel, Oxfordshire, England, United Kingdom, Europe
Running border collie in a field, Oxfordshire, England, United Kingdom, Europe
Border collie in a field, Oxfordshire, England, United Kingdom, Europe
Blue-footed booby (Sula nebouxii) pair in courtship display on North Seymour Island, Galapagos, Ecuador, South America