Mark MacEwen / Broad snouted caiman (Caiman latirostris) baby in mothers mouth being carried from nest, Sante Fe, Argentina, February

David Shale / Fang Tooth {Anoplogaster cornuta} close-up of head showing teeth, from the Mid-Atlantic Ridge, 2600m

Mark Carwardine / Great white shark (Carcharodon carcharias) underwater, Guadalupe Island, Mexico (North Pacific)

Doug Perrine / Great white shark jaws open at surface {Carcharodon carcharias} South Africa (Non-ex).

Brandon Cole / Great white shark (Carcharodon carcharias) attacking below surface. Dyer Is, South Africa NOT FOR SALE IN USA, DIGITALLY ENHANCED

Anup Shah / Nile crocodile holding newly hatched young in mouth {Crocodylus niloticus} Kenya

David Shale / Deep sea Anglerfish {Himantolophus sp} female with lure projecting from head to attract prey, Atlantic ocean. Anglerfish have small poorly developed eyes but detect movement and prey through a well de...

David Shale / Deep sea Anglerfish {Melanocoetus sp} female with lure projecting from head to attract prey. Atlantic ocean

Juergen Freund / Close-up of jaw of Garfish {Belone belone} Indo-pacific

David Shale / Deep sea Anglerfish female with lure {Himantolophus sp} Atlantic ocean

Klein & Hubert / Nile crocodile (Crocodylus niloticus) close up of jaw and teeth, Chobe River, Botswana, Africa.

Andy Murch / Lemon shark (Negaprion brevirostris) surfacing with open mouth. Tiger Beach, Little Bahama Bank, Bahamas.

David Fleetham / Close up at the dental plates of Three color parrotfish (Scarus tricolor) as it comes in for a bite of hard coral, Fiji.

Nick Garbutt / Walrus (Odobenus rosmarus) amongst group hauled out on shore. Spitsbergen, Svalbard, Norway. July.

Alex Mustard / American crocodile (Crocodylus acutus) shows off its teeth. Jardines de la Reina, Gardens of the Queen National Park, Cuba. Caribbean Sea.

Franco Banfi / Tiger moray / Fangtooth Moray (Enchelycore anatina), South Tenerife, Canary Islands, Atlantic Ocean.

Shane Gross / Face portrait of a Great hammerhead shark (Sphyrna mokarran) off Bimini, Bahamas.

Klein & Hubert / Long eared jerboa (Euchoreutes naso) digging a burrow with teeth, Gobi desert, Mongolia

Shane Gross / American crocodile (Crocodylus acutus) with open mouth amongst Seagrass (Alismatales). Gardens of the Queen National Park, Cuba.

Klein & Hubert / Black / Melanistic Leopard (Panthera pardus) growling. Controlled conditions

Anup Shah / African elephant (Loxodonta africana) near water approaching - remote camera. Masai Mara National Reserve, Kenya.

Will Burrard-Lucas / Black and white image of African elephant (Loxodonta africana) bulls males facing off against each other, Tsavo Conservation Area, Kenya. Editorial use only. Other uses need clearance.

Will Burrard-Lucas / Black and white image of African elephant (Loxodonta africana) Tsavo Conservation Area, Kenya. Taken with a remote camera buggy / BeetleCam. Editorial use only. Other uses need clearance.

Franco Banfi / Sperm whale (Physeter macrocephalus) young male trying to copulate with a female. The calf of the female was in the way so the male is trying to chase it away. Dominica.

Klein & Hubert / Hippopotamus (Hippopotamus amphibius) charging in Luangwa river, close up of mouth and teeth, Zambia

Alex Mustard / Tiger cardinalfish (Cheilodipterus macrodon) male mouth brooding a clutch of eggs behind his sharp teeth. Gubal Island, Egypt. Strait Of Gubal, Red Sea.

Paul Williams / Lion (Panthera leo) close up of teeth while its snarling, captive.

Will Burrard-Lucas / Black and white image of African elephant (Loxodonta africana) herd, females with extremely long tusks, Tsavo Conservation Area, Kenya. Taken with a remote camera buggy / BeetleCam. Editorial use only...

Will Burrard-Lucas / Black and white image of African elephant (Loxodonta africana) herd at water hole, female with extremely long tusks, Tsavo Conservation Area, Kenya. Taken with a remote camera buggy / BeetleCam. Edito...

Will Burrard-Lucas / Black and white image of African elephant (Loxodonta africana) female with extremely long tusks, Tsavo Conservation Area, Kenya. Taken with a remote camera buggy / BeetleCam. Editorial use only. Other...

Will Burrard-Lucas / Black and white image of African elephant (Loxodonta africana) female with extremely long tusks, Tsavo Conservation Area, Kenya. Taken with a remote camera buggy / BeetleCam. Editorial use only. Other...

Will Burrard-Lucas / Black and white image of African elephant (Loxodonta africana) bull with extremely long tusks, Tsavo Conservation Area, Kenya. Taken with a remote camera buggy / BeetleCam. Editorial use only. Other u...

Will Burrard-Lucas / African elephant (Loxodonta africana) female with very large tusks, Tsavo National Park, Kenya. Highly commended in the GDT European Wildlife Photographer of the Year Awards 2018. Editorial use only....

David Fleetham / Great white shark (Carcharodon carcharias) breaking surface with mouth open. Guadalupe Island, Mexico.

David Fleetham / Great barracuda (Sphyraena barracuda) with three parasitic Copepods at end of upper jaw. Hawaii.

Guy Edwardes / Hippopotamus (Hippopotamus amphibius) in Chobe River, Botswana.

Claudio Contreras / American crocodile (Crocodylus acutus), underwater, Jardines de la Reina / Gardens of the Queen National Park, Caribbean Sea, Ciego de Avila, Cuba, January. Vulnerable species.

Andy Rouse / Bengal tiger (Panthera tigris) female 'Noor' in waterhole yawning, Ranthambhore, India, Endangered species.

Piotr Naskrecki / Angolan free-tailed bat (Mops condylurus) close up of teeth. Codzo Caves, Mazamba, Sofala, Mozambique. Controlled conditions

Piotr Naskrecki / Angolan free-tailed bat (Mops condylurus) close up of teeth. Codzo Caves, Mazamba, Sofala, Mozambique. Controlled conditions

Alex Mustard / American crocodile (Crocodylus acutus) reflected in the surface as it floats, Jardines de la Reina, Gardens of the Queen National Park, Cuba. Caribbean Sea.

Mark Carwardine / Grey whale (Eschrichtius robustus) at water surface with mouth open showing baleen plates, San Ignacio Lagoon, Baja California, Mexico

Claudio Contreras / American crocodile (Crocodylus acutus) split level with animal resting at surface in shallow water over seagrass bed, Banco Chinchorro Biosphere Reserve, Caribbean region, Mexico

Claudio Contreras / American crocodile (Crocodylus acutus) resting just above seagrass underwater, Banco Chinchorro Biosphere Reserve, Caribbean region, Mexico