832-386377 - Spectacled caiman (Caiman crocodilus yacare), open mouth with leeches, animal portrait, Pantanal, Mato Grosso, Brazil, South America

832-383926 - Hippo (Hippopotamus amphibius) with open mouth, Moremi Game Reserve, Botswana, Africa

832-386969 - California sea lion (Zalophus californianus), male, splashing in water, animal portrait, close-up, captive, Germany, Europe

832-385096 - Red fox (Vulpes vulpes), with open mouth and erect ears, animal portrait, Waterleidingduinen, North Holland, Netherlands

832-383927 - Hippo (Hippopotamus amphibius) with open mouth, Chobe National Park, Botswana, Africa

832-385414 - Northern gannet (Morus bassanus) with open beak, Lummenfelsen, Heligoland, Schleswig-Holstein, Germany, Europe

832-385735 - Jaguar (Panthera onca) looking out, sitting on riverbank, Pantanal, Mato Grosso, Brazil, South America

832-386838 - Siberian tiger (Panthera tigris altaica), running, direct view, captive, Czech Republic, Europe

1116-47902 - Lioness (Panthera leo) lying in long grass yawns widely, Maasai Mara National Reserve, Kenya

1116-48003 - Koi fish in a pond, Thailand

1116-47524 - Close-up of lion cubs (Panthera leo) playing near mother, Serengeti National Park, Tanzania

1116-47509 - Female cheetah (Acinonyx jubatu) sits in grass facing right, Serengeti National Park, Tanzania

1116-47916 - Cheetah (Acinonyx jubatus) cub yawning with mouth wide open, Maasai Mara National Reserve, Kenya

1116-48767 - A Gorilla from the Giranzea Gorilla family sitting in the lush foliage with it's mouth open, Northern Province, Rwanda

1116-47594 - Female Brown bear (Ursus arctos) looking at camera with mouth open, captive in Alaska Wildlife Conservation Center, South-central Alaska, Portage, Alaska, United States of America

1116-47263 - Side-view head shot of yawning Hippopotamus (Hippopotamus amphibius) in Ngorongoro Conservation Area, Tanzania

1174-8152 - Two hippos, Hippopotamus amphibius, fight each other on land, one with his jaws wide open, the other with bloodied mouth and flanks, Londolozi Game Reserve, Sabi Sands, South Africa

1174-7977 - The side profile of a male lion, Panthera leo, lit up by spotlight at night, mouth open , Londolozi Game Reserve, Greater Kruger National Park, South Africa

1174-7976 - A male leopard, Panthera pardus, walks toward camera, direct gaze, mouth open, Londolozi Game Reserve, Greater Kruger National Park, South Africa

1174-7878 - The head of a leopard, Panthera pardus, in a tree, mouth open, looking out of frame, Sabi Sands, Greater Kruger National Park, South Africa

1178-27957 - Dolphin with mouth open underwater

1116-46664 - Captive Adult Brown Bear (Ursus Arctos) Looks At Camera With Mouth Open At The Alaska Wildlife Conservation Center, Portage, Alaska, United States Of America

1116-46512 - Southern Elephant Seal (Mirounga Leonina) With It's Mouth Open, Neko Harbour, Antarctic Peninsula, Antarctica

1178-27940 - Alligator breaching with its mouth open in Everglades National Park, Florida, USA

860-288521 - Hippopotamus (Hippopotamus amphibius) splashing with open mouth in Kruger National park, South Africa

860-288517 - Hippopotamus (Hippopotamus amphibius) splashing with open mouth in Kruger National park, South Africa

860-288031 - Commerson's frogfish (Antennarius commerson) yawning in a sponge. Mayotte

860-288232 - Canary fish. Dusky grouper (Epinephelus marginatus). Lanzarote. Canary Islands.

1116-46072 - A Male Lion (Panthera Leo) Standing In The Grass On The African Savannah With His Mouth Slightly Open As He Starts To Yawn, Narok, Kenya

1116-44734 - Red Fox (Vulpes Vulpes) Mother Being Playful, Montreal, Quebec, Canada

1174-6680 - Two wild dog, Lycaon pictus, walk together, looking out of frame, mouth open, dry yellow grass background, Londolozi Game Reserve, Kruger National Park, Sabi Sands, South Africa

1116-44264 - Mating Lions (Panthera Leo), Serengeti National Park, Tanzania

1116-44030 - Crocodile (Crocodylinae), Chobe National Park, Kasane, Botswana

1116-43930 - Female Cheetah (Acinonyx Jubatus) Rubs Against Tree Trunk And Yawns With Open Mouth While Young Cub Lies At Her Feet Near Ndutu, Ngorongoro Crater Conservation Area, Tanzania

1116-43881 - Sockeye Salmon (Oncorhynchus Nerka) Underwater, Paxson, Alaska, United States Of America

860-287096 - Gray Whale (Eschrichtius robustus), adult, mouth open behind the boat, Ojo de Liebre Lagoon (formerly known as Scammon's Lagoon), Guerrero Negro, Baja California Sur, Mexico

860-287095 - Gray Whale (Eschrichtius robustus), adult, mouth open behind the boat, Ojo de Liebre Lagoon (formerly known as Scammon's Lagoon), Guerrero Negro, Baja California Sur, Mexico

1116-42342 - Polar Bear (Ursus Maritimus) Chewing On A Fence Near Churchill, Manitoba, Canada

1174-4974 - A leopard cub's head and paws, Panthera pardus, sitting in a tree in black and white, looking away with mouth open, Londolozi Game Reserve, Sabi Sands, Greater Kruger National Park, South Africa

1174-5135 - A leopard's head, Panthera pardus, looking away over shoulder, mouth open, rosettes on fur coat, white whiskers, Londolozi Game Reserve, Sabi Sands, Greater Kruger National Park, South Africa

1174-5176 - A leopard cub's head, Panthera pardus, between two branches, looking up out of frame, open mouth, green yellow eyes, Londolozi Game Reserve, Sabi Sands, Greater Kruger National Park, South Africa

1174-5064 - A spotted hyena cub, Crocuta crocuta, alert, chews a log, mouth open, Londolozi Game Reserve, Sabi Sands, Greater Kruger National Park, South Africa

1174-5060 - A male lion, Panthera leo, walks towards the camera, looking out of sight, mouth open, steam from mouth, long grass in background, Londolozi Game Reserve, Sabi Sands, Greater Kruger National Park, South Africa

1174-5157 - A leopard mother, Panthera pardus, lies down, eyes closing, mouth open as a cub bites her ear with blue eyes, Londolozi Game Reserve, Sabi Sands, Greater Kruger National Park, South Africa

1174-5017 - A leopard cub's head, Panthera pardus, lies in a tree, alert, mouth open showing tongue, paw drapes over branch, yellow brown eyes, Londolozi Game Reserve, Sabi Sands, Greater Kruger National Park, South Africa

1174-5221 - A leopard, Panthera pardus, lies on a boulder and yawns, mouth open showing teeth, head tilted back, long white whiskers, in black and white, Londolozi Game Reserve, Sabi Sands, Greater Kruger National Park, South Africa

1174-5175 - A side profile of a male lion's head, Panthera leo, open mouth, lit up by spotlight, black background, Londolozi Game Reserve, Sabi Sands, Greater Kruger National Park, South Africa

1174-5182 - A lion cub, Panthera leo, sits down, looks away, open mouth, Londolozi Game Reserve, Sabi Sands, Greater Kruger National Park, South Africa

1174-5186 - A cheetah's head, Acinonyx jubatus, looking away, ears back, mouth open, in black and white, Londolozi Game Reserve, Sabi Sands, Greater Kruger National Park, South Africa

1174-5137 - A lion cub, Panthera leo, lies on the back on a lioness, gripping her around the shoulders, the lioness bends down and snarls, open mouth, with a bloody face, Londolozi Game Reserve, Sabi Sands, Greater Kruger National Park, South Africa

1174-5133 - A leopard, Panthera pardus, hugs a fallen over tree branch, snarls and looking away, open mouth, sunlight and greenery in background, Londolozi Game Reserve, Sabi Sands, Greater Kruger National Park, South Africa

1174-5139 - A leopard, Panthera pardus, walks towards the camera on a sand road, looking away, ears back, mouth open, in black and white, Londolozi Game Reserve, Sabi Sands, Greater Kruger National Park, South Africa

1174-5039 - The head and body of a common tiger snake, Telescopus semiannulatus, mouth open, yellow orange eyes, coiled on a branch, Londolozi Game Reserve, Sabi Sands, Greater Kruger National Park, South Africa

1174-5019 - A leopard, Panthera pardus, walks towards the camera on sand road, direct gaze, ears facing backward, mouth open, long green grass, Londolozi Game Reserve, Sabi Sands, Greater Kruger National Park, South Africa

1174-4962 - A lioness, Panthera leo, runs away with its tail up, wide eyed and mouth open as four spotted hyena, Crocuta crocuta, chase after it in dry yellow grass, Londolozi Game Reserve, Sabi Sands, Greater Kruger National Park, South Africa

857-95819 - Marmora sea late afternoon with ships sailing near Uskudar and Besektas, Istanbul, Turkey

857-95580 - Cargo ship with containers at Marmara Sea, Istanbul, Turkey

1116-41556 - Captive Kodiak Grizzly Bear

832-381669 - Harp Seal or Saddleback Seal (Pagophilus groenlandicus, Phoca groenlandica), pup on pack ice, Magdalen Islands, Gulf of Saint Lawrence, Quebec, Canada, North America

832-381645 - Beluga Whale, White Whale (Delphinapterus leucas), Sea of Japan, Primorsky Krai, Russia, Europe

832-381058 - Beluga Whale, White Whale (Delphinapterus leucas), Sea of Japan, Primorsky Krai, Russia, Europe

832-379943 - Woman in front of tent, refugee camp Idomeni on the Greek-Macedonian border, Greece, Europe

832-379358 - Panamic green moray eel or chestnut moray eel (Gymnothorax castaneus) making threatening gesture, Cocos Island, Costa Rica, Central America

832-379354 - Lion (Panthera leo) mating, Okavango Delta, Botswana, Africa

1116-39963 - Tourists above on a canoe and a Whale Shark (Rhiniodon typus) below with it's mouth open. This is the world's largest species of fish, Oslob, Philippines

1116-39965 - A Whale Shark (Rhiniodon typus) with it's mouth open, filter feeding at the surface. This is the world's largest species of fish, Oslob, Philippines

1116-40305 - Yawning Hippopotamus (Hippopotamus Amphibius) At Serengeti National Park, Tanzania

1116-40309 - Man Under Waterfall

1116-39958 - A yawning trumpetfish (Aulostomus chinensis), Hawaii, United States of America

1112-3890 - Giant trevally (Caranx ignobilis), at One Foot Island, Aitutaki, Cook Islands, South Pacific Islands, Pacific

743-1681 - Lion (Panthera leo) male, Kgalagadi Transfrontier Park, South Africa, Africa

832-379298 - Eurasian lynx (Lynx lynx), portrait, licking its mouth, captive, North Rhine-Westphalia, Germany, Europe

832-379032 - Yacare Caiman (Caiman yacare, Caiman crocodilus yacara), Pantanal, Mato Grosso do Sul, Brazil, South America

733-7619 - Yellow billed stork (Mycteria ibis) fighting, Lake Manyara National Park, Tanzania, East Africa, Africa

1167-1730 - Gentoo penguin (Pygoscelis papua) pair communicating, Damoy Point, Dorian Bay, Wiencke Island, Antarctic Peninsula, Antarctica, Polar Regions

1167-1733 - Gentoo penguin (Pygoscelis papua) carries pebble in colony, Damoy Point, Wiencke Island, Antarctic Peninsula, Antarctica, Polar Regions

1167-1731 - Gentoo penguin (Pygoscelis papua) pair, changing places on nest, Damoy Point, Wiencke Island, Antarctic Peninsula, Antarctica, Polar Regions

1167-1732 - Gentoo penguin (Pygoscelis papua) calling, Damoy Point, Dorian Bay, Wiencke Island, Antarctic Peninsula, Antarctica, Polar Regions

1256-46 - Nazca Booby (Sula granti) with open mouth, Genovesa Island, Galapagos National Park, Ecuador, South America

1256-22 - Nazca Booby (Sula granti) with open mouth, Genovesa Island, Galapagos National Park, Ecuador, South america

764-5908 - Lion (Panthera leo) cub, Ngorongoro Conservation Area, Tanzania, East Africa, Africa

1172-1859 - Grizzly Bear

1172-1866 - Lion Roaring

1172-1857 - Grizzly Bear Roaring

1184-878 - Spider monkey (Atelidae), Achutupu, San Blas Islands, Kuna Yala, Panama, Central America

1131-925 - Yacare caiman (Caiman yacare), Pantanal, Mato Grosso, Brazil, South America

741-5106 - Hippopotamus (Hippopotamus amphibius) threat-yawning in the Khwai River under the rain, Khwai Concession, Okavango Delta, Botswana, Africa

1225-926 - A girl takes her German short-haired pointer for a walk in woods near Ashmore in Dorset, England, United Kingdom, Europe

1199-429 - Lady in market in Berestagi, Sumatra, Indonesia, Southeast Asia, Asia

1184-388 - Bottlenose Dolphin, Tursiops tursiops, Grassy Key, Florida, United States of America, North America

1179-911 - Drying codfish, a typical Norwegian product, Svensby, Lyngen Alps, Troms, Lapland, Norway, Scandinavia, Europe

1131-734 - Two year old young Giant Panda (Ailuropoda melanoleuca), Chengdu, Sichuan, China, Asia

1112-3120 - Long-tailed macaque (Macaca fascicularis), Bako National Park, Sarawak, Borneo, Malaysia, Southeast Asia, Asia

1161-8693 - American alligator with mouth open showing its teeth basking by Turner River by Tamiami Trial, the Florida Everglades, USA

857-92144 - A young Sri Lankan boy 'opens wide' as a doctor peers into his mouth, Kalmunai, Sri Lanka.

764-5322 - Cape giraffe (Giraffa camelopardalis giraffa) eating, Kruger National Park, South Africa, Africa

1189-18 - Atlantic puffin (Fratercula arctica), United Kingdom, Europe

764-5170 - Lioness (Panthera leo), Kgalagadi Transfrontier Park encompassing the former Kalahari Gemsbok National Park, South Africa, Africa

764-5167 - Greater kudu (Tragelaphus strepsiceros) buck with his mouth open, Kgalagadi Transfrontier Park encompassing the former Kalahari Gemsbok National Park, South Africa, Africa

764-5160 - Lion (Panthera leo) demonstrating the flehmen response, Ngorongoro Conservation Area, UNESCO World Heritage Site, Serengeti, Tanzania, East Africa, Africa