A close-up of the mouth of a whitemouth moray eel (Gymnothorax meleagris), showing its needle sharp teeth, United States of America, North America

Lion (Panthera leo) showing flehmen grimace, Zimanga private game reserve, KwaZulu-Natal, South Africa, Africa

Crabeater seal (Lobodon carcinophaga) showing teeth while resting on ice floe in Paradise Bay, Antarctica, Polar Regions

A close up look at a piranha caught on Belluda Creek, Ucayali River, Loreto, Peru, South America

Female Bengal tiger, Panthera tigris tigris, in Ranthambore National Park, Rajasthan, India

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

Antarctic fur seal (arctocephalus gazella) fortuna bay, south georgia, portrait of bull seal showing teeth.

Great Barracuda (Sphyraena barracuda) turning in mid frame showing clear teeth detail and other fish in background.

Common dolphin (Delphinus delphis) showing a large number of rake marks on its back inflicted by the teeth of other common dolphins. Hebrides, West coast of Scotland.

Lizardfish ( Synodus variegatus), detail of head showing jaws and teeth, Rangiroa, French Polynesia

Spotted dolphin (Stenella attenuata). The head and body of a spotted dolphin clearly showing teeth mark scars. Caribbean.

Two juvenile Bottlenose dolphins (Tursiops truncatus) showing teeth in socialising display, Moray Firth, Scotland.

Siberian Tiger (Panthera tigris altaica), yawning, showing its teeth, in the snow, zoo, Germany, Europe

Eurasian Lynx (Lynx lynx), showing teeth and tongue, aggressive behavior, Sweden, Europe

Gelada (Theropithecus gelada), male showing his teeth, captive, Switzerland, Europe

African ethnicity young woman in stylish sunglasses, with curly hair tied up in high ponytail, looking away while smiling broadly showing straight perfect teeth, posing against wall background

African wild dog (Lycaon pictus), endangered species, shows teeth, Namibia, Africa

Symbiotic behaviour Symbiosis of jewel perch vermillion seabass (Cephalopholis miniata) lies at cleaning stationwith mouth wide open showing teeth rows of teeth motionless in coral reef lets cleaner wrasse bluestreak cleaner wrasse (Labroides dimidiatus) rid itself of parasites, Indian Ocean, Mascarene Islands, Mauritius, Africa

Hippo (Hippopotamus amphibius) showing his teeth, Moremi Game Reserve, Botswana, Africa

Close-up of a Bengal tiger (Panthera tigris tigris) lying in the forest, widely yawning, Madhya Pradesh, India

Teenage girl shows off her braces, Lincoln, Nebraska, United States of America

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

Grey Wolf (Canis Lupus) Showing Submission Behaviour, Montebello, Quebec, Canada

Lioness Showing Teeth

Hawaii, Oahu, North Shore, Galapagos shark showing teeth at surface.

Hawaii, Oahu, North Shore, Galapagos shark showing teeth at surface.

Hawaii, Oahu, North Shore, Galapagos shark showing teeth at surface.

A hippo, Hippopotamus amphibius, open mouth, yawning, showing teeth, Londolozi Game Reserve, South Africa

A close-up of a lion's mouth, Panthera leo, showing barbed tongue, teeth, whiskers and nose with brown, dried leaves, Londolozi Game Reserve, Sabi Sands, Greater Kruger National Park, South Africa

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

Hippo Hippopotamus amphibius in waterhole yawning and showing its teeth, Sabi Sands, South Africa

Two wild dogs, Lycaon pictus, stand on their hind legs in long dry grass and fight, bloody faces, showing teeth, Londolozi Game Reserve, Sabi Sands, Greater Kruger National Park, South Africa

Two hippopotamus, Hippopotamus amphibius, fight in the water, open mouths showing teeth, Londolozi Game Reserve, Sabi Sands, Greater Kruger National Park, South Africa

Two zebra, Equus quagga, stand on their hind legs rearing and fight, biting showing teeth, Londolozi Game Reserve, Sabi Sands, Greater Kruger National Park, South Africa

Two wild dog, Lycaon pictus, standing on their hind legs and fighting, front legs around each other, bloody faces, mouths open showing teeth, Londolozi Game Reserve, Sabi Sands, Greater Kruger National Park, South Africa

A silhouette of a leopard, Panthera pardus, standing in the fork of a tree, yawning showing teeth, against orange sunset sky, Londolozi Game Reserve, Sabi Sands, Greater Kruger National Park, South Africa

A male lion's head, Panthera leo, scarred nose, looking away, with yellow eyes, showing its tongue and teeth, Londolozi Game Reserve, Sabi Sands, Greater Kruger National Park, South Africa

The head of a cheetah, Acinonyx jubatus jubatus, as it yawns, teeth and tongue showing, eyes closed, Londolozi Game Reserve, Sabi Sands, South Africa

lemon shark shark swimming under water over sandy ground underside of head visible mouth open showing teeth horizontal format underwater shot lemon sharks Bahamas Central America America Atlantic Ocean Bahamas Central America America Atlantic Ocean

Alaskan brown bear animals close-up of bear showing teeth threat display behaviour danger

Spotted hyena or laughing hyena (Crocuta crocuta) showing submissive behaviour by flattening the ears and showing teeth. Mpumalanga. South Africa.

Jaguar showing teeth (Panthera onca) is a wild cat species and the only extant member of the genus Panthera native to the Americas. Pantanal, Mato Grosso, Brazil