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

Phil Savoie / Painted nomad bee (Nomada fucata) male bee with characteristic green eyes, sleeping with jaws locked around grass stem, Monmouthshire, Wales, UK. June

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

David Fleetham / Jaws and teeth of Stout Moray (Gymnothorax eurostus). Hawaii.

Claudio Contreras / American crocodile (Crocodylus acutus) extreme close up with jaws open, Banco Chinchorro Biosphere Reserve, Caribbean region, Mexico

Neil Aldridge / Nile crocodile (Crocodylus niloticus) snatching a Mozambique tilapia (Oreochromis mossambicus) in its jaws, Shingwedzi River, Kruger National Park, South Africa.

Jabruson / Hippopotamuses fighting (Hippopotamus amphibius) taken before major crash in numbers in the 1990s due to political instability and hunting. Rwindi sector of the Virunga National Park. Democratic Repub...

Martin Dohrn / African driver / Siafu / Safari ant biting {Dorylus/ Anomma speciess). Species is non-stinging, but jaws can tear human flesh. East Africa

Anup Shah / Nile crocodile (Crocodylus niloticus) attacking a Wildebeest (Connochaetes taurinus) as it crosses the Mara River. Masai Mara National Reserve, Kenya, September 2009

Bence Mate / Jacare / Yacare caiman (Caiman crocodilus yacare) with young armadillo prey ib its jaws. Pantanal, Brazil. WINNER: Eric Hosking Award portfolio image 3/6 - Wildlife Photographer of the Year 2010

Ann & Steve Toon / Nile crocodile (Crocodylus niloticus) with jaws wide open, Kruger National Park, South Africa

Wild Wonders of Europe / Maitland / Female Giant / Mammoth wasp (Megascolia flavifrons) close-up of head showing short antennae and long curved jaws or mandibles, Stenje region, Galicica National Park, Macedonia, June 2009