1174-9723 - Person exploring a glacial Ice Cave on the Svinafellsjokull glacier

1174-9725 - Glacial Ice Cave, Svinafellsjokull glacier, Skaftafell National Park, Iceland

1174-9724 - Glacial Ice Cave, Svinafellsjokull glacier, Skaftafell National Park, Iceland

832-389667 - Girl and teddy bear with mouth mask

832-389708 - Muraena augusti (Muraena augusti) with open mouth, Mediterranean Sea

832-389681 - Star puffer (Arothron stellatus) and cleaner wrasse (Labroides dimidiatus), open mouth, Indo-Pacific Ocean

832-389584 - Eurasian red squirrel (Sciurus vulgaris) with acorn in its mouth, Schleswig-Holstein, Germany, Europe

832-389526 - Aerial view, sun in the mouth of a dragon, Wat Samphan dragon temple, Bangkok, Thailand, Asia

832-389419 - Slice anemone, Giant Cup Mushroom (Amplexidiscus fenestrafer), detail with mouth, Pacific, Great Barrier Reef, UNESCO World Heritage, Australia, Oceania

832-389411 - Underside with mouth of spiny cushion star (Culcita novaeguineae), Detail, Starfish, Pacific, Great Barrier Reef, Australia, Oceania

832-388933 - Two Red foxes (Vulpes vulpes) fighting with open mouth, playful, Netherlands

1174-9238 - An elephant, Loxodonta africana, stands in a water hole and drinks, trunk to mouth, side profile, Londolozi Wildlife Reserve, Greater Kruger National Park, South Africa

1174-9235 - A close up of a giraffe's mouth and nose, Giraffa camelopardalis giraffa, Londolozi Wildlife Reserve, Greater Kruger National Park, South Africa

832-388880 - Red fox (Vulpes vulpes) in winter coat, licking, sitting, Netherlands

832-388602 - Beagle, male, running with stick in mouth in a meadow, Austria, Europe

832-388296 - Arctic fox (alopex lagopus), young animal runs in a meadow, licks its mouth, Dovrefjell National Park, Norway, Europe

832-388326 - Train ride with mouth protection mask, man working on laptop, Germany, Europe

1174-8640 - Two hippos, Hippopotamus amphibius, fight on land, mouth open, blood visible, Sabi Sands, Greater Kruger National Park, South Africa

1174-8781 - Newly born leopard cubs, Panthera pardus, lie together between roots and mud walls, one cub opens it mouth with closed eyes, Sabi Sands, Greater Kruger National Park, South Africa

1174-8641 - A giant plated lizard, Gerrhosaurus validus, lies on a rock, mouth open, looking out of frame, Sabi Sands, Greater Kruger National Park, South Africa

1174-8794 - A leopard, Panthera pardus, walks towards the camera, holding an impala calf carcass in its mouth, Aepyceros melampus, Sabi Sands, Greater Kruger National Park, South Africa

1174-8639 - Two hippos, Hippopotamus amphibius, fight on land, mouth open, blood visible, Sabi Sands, Greater Kruger National Park, South Africa

1174-8647 - A leopard, Panthera pardus, peers between tree roots, looking out of frame, mouth open, Sabi Sands, Greater Kruger National Park, South Africa

1174-8805 - A male lion, Panthera leo in grass, mouth open, Sabi Sands, Greater Kruger National Park, South Africa

828-1387 - Bocca della Verita (Mouth of Truth), Santa Maria in Cosmedin Church, Rome, Lazio, Italy, Europe

828-1386 - Bocca della Verita (Mouth of Truth), Santa Maria in Cosmedin Church, Rome, Lazio, Italy, Europe

832-387959 - Two Reef manta rays (Mobula alfredi) swims with open mouth over sandy bottom, from the front, Great Barrier Reef, Coral Sea, Pacific Ocean, Australia, Oceania

832-387960 - Pilot Fish (Naucrates ductor) swimming in front of mouth, reef manta ray (Mobula alfredi) with curled up head fins, Great Barrier Reef, Coral Sea, Pacific Ocean, Australia, Oceania

1202-336 - The riverside village of Polruan, in the mouth of the River Fowey, near the town of Fowey, southern Cornwall, England, United Kingdom, Europe

1202-329 - The rocky coast of Penlee Point, looking towards Rame Head and at the mouth of Plymouth Sound, east Cornwall, England, United Kingdom, Europe

832-386615 - Lion (Panthera leo), old animal, animal portrait, Kruger National Park, South Africa, Africa

832-386360 - Yacare caiman (Caiman crocodilus yacara), Pantanal, Mato Grosso, Brazil, South America

832-386628 - Leopard (Panthera pardus) resting, Etosha National Park, Namibia, Africa

832-384882 - Girl, 3 years, portrait, sleeps in bed, with thumb in mouth, Germany, Europe

832-386326 - Hippo (Hippopotamus amphibius), grazing in shallow water, open mouth, Moremi Wildlife Reserve, Ngamiland, Botswana, Africa

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

1202-250 - The dramatic mixed sand and rocks of the beach at Speke's Mill Mouth, on Devon's Atlantic coast, near Hartland Quay, Devon, England, United Kingdom, Europe

1202-228 - Bayards Cove, the oldest part of the historic harbour of Dartmouth, at the mouth of the River Dart, on Devon's south coast, Dartmouth, Devon, England, United Kingdom, Europe

1202-227 - Bayards Cove, the oldest part of the historic harbour of Dartmouth, at the mouth of the River Dart, on Devon's south coast, Dartmouth, Devon, England, United Kingdom, Europe

1202-248 - A waterfall cascades down a gorge cut into coastal cliffs, at Speke's Mill Mouth, near Hartland Quay, on Devon's Atlantic coast, Devon, England, United Kingdom, Europe

1116-49025 - A Puffin (Fratercula) with Sand Eels in it's mouth, Farne Islands, Northumberland, England

1116-47560 - Tiger (Panthera tigris) in the wild, Ranthambhore National Park, Northern India, Rajasthan, India

1116-47873 - European bee-eaters (Merops apiaster) perched on a branch, one with an insect in it's mouth, Pusztaszer, Hungary

1116-47349 - White-tailed eagle (Haliaeetus albicilla) with fish in it's mouth, Hokkaido, Japan

1116-48262 - Toddler Making Funny Faces At The Camera And Putting His Fingers in His Mouth, Langley, British Columbia, Canada

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

1116-48003 - Koi fish in a pond, Thailand

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

1116-47521 - Close-up of male lion (Panthera leo) showing bloody teeth, Serengeti National Park, Tanzania

1116-47833 - Ship moored in the harbour along the West Coast of Ireland at the mouth of the Galway Bay, Inishmore, Aran Islands, Kilronan, County Galway, Ireland

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

1116-47494 - Close-up of male lion (Panthera leo) head in profile, Serengeti National Park, Tanzania

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

1116-48056 - Heron (Ardeidae) with a fish in it's mouth, Kiskunsag National Park, Pusztaszer, Hungary

1116-47731 - Close-up of a Stout moray eel (Muraena robusta) with sharp teeth, Wailea, Maui, Hawaii, United States of America

1116-47550 - Northern Hawk Owl (Surnia ulula), known for sitting on the highest perch possible while looking for prey such as voles moving below. This one sits on the top of a tree against a blue sky with a rodent in it's mouth, Alaska, United States of America

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

1116-47491 - Common ostrich (Struthio camelus) stands in grass opening mouth, Serengeti National Park, Tanzania

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

1240-343 - Mouth of the Shannon, County Clare, Munster, Republic of Ireland, Europe

1174-8153 - A hippo, Hippopotamus amphibius, raises its head out of the water and opens its mouth, splashing, Londolozi Game Reserve, Sabi Sands, South Africa

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

746-89039 - Estuary of the Douro river, Porto, Portugal, Europe

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

1116-46927 - A Brown Bear (ursus arctos) about to catch a salmon in it's mouth at the top of Brooks Falls, Alaska. The fish is only a few inches away from its gaping jaws. Shot with a Nikon D800 in July 2015, Alaska, United States of America

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

1174-7103 - A leopard, Panthera pardus, stands in a tree at night, nyala kill in its mouth, Tragelaphus angasii, lit up by spotlight, Londolozi Game Reserve, Sabi Sands, Greater Kruger National Park, South Africa

1116-46506 - Close Up Of A Brown Bear (Ursus Arctos) Eating Grass

1116-46557 - Jaguar (Panthera Onca) Carries Fresh Kill In His Mouth, Pantanal Conservation Area, Brazil

1116-46278 - Three Yacare Caiman (Caiman Yacare) In Shallows At Sunset, Mato Grosso Do Sul, Brazil

1116-46304 - A Dog Walks In A Grass Field With A Toy Ball In It's Mouth, South Shields, Tyne And Wear, England

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

1116-46536 - Horse With Frost Around It's Mouth, Cremona, Alberta, Canada

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

809-7837 - A lioness (Panthera leo) moving a young cub by carrying it in her mouth, Masai Mara National Park, Kenya, East Africa, Africa

860-288027 - Hippopotamus (Hippopotamus amphibius) opening the mouth, Kenya , Masaï Mara, National Reserve

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

860-288624 - Young Arctic Fox (Alopex Lagopus) yawning in tundra, Jameson Land, Northeast Greenland

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

860-288411 - Cheetah (Acinonyx jubatus), occurs in Africa, portrait, captive

860-288029 - Leopard seal (Hydrurga leptonyx) on the beach of Ulva Island in New Zealand wich is "predatory free" because cleared of introduced mammals predators. The Leopard seal is fairly regular in the area and it was really amazing to observe it on a beach and not in the middle of the Antarctic ice.

860-288501 - Mangrove snake (Boiga dendrophila dendrophila)

860-288193 - Chiapasius spectacled caiman (Caiman crocodilus chiapasius)

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

860-288190 - Schneider's dwarf caiman (Paleosuchus trigonatus)

860-288444 - Asian (Bengal) Tiger (Panthera tigris tigris), resting, Private reserve, South Africa

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

860-287837 - Ruffed lemur (Varecia variegata) in the forest, Pangalanes Canal, Ampitabe Lake, Atsinanana Region, Madagascar

832-383807 - Carving the mouth of a wooden mask using wood carving tools, wooden mask carver, Bad Aussee, Styria, Austria, Europe

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