Edwin Giesbers / Saltwater crocodile (Crocodylus porosus) close up portrait, Sarawak, Borneo, Malaysia

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

Michael Pitts / Saltwater crocodile underwater {Crocodylus porosus} Kakadu NP, NT, Australia

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

Jordi Chias / Crocodile icefish or White-blooded fish (Channichthyidae), Antarctic Peninsula, Antarctica.

Shane Gross / Cuban crocodile (Crocodylus rhombifer) in a cenote in Cienaga de Zapata National Park. Cuba. Critically endangered species.

Shane Gross / Cuban crocodile (Crocodylus rhombifer) in a cenote in Cienaga de Zapata National Park. Cuba. Critically endangered species.

Juergen Freund / Australian freshwater crocodiles (Crocodylus johnsoni) catching a Little red flying fox (Pteropus scapulatus) flying to drink from a watering hole, Kimberley, Western Australia.

Juergen Freund / Australian freshwater crocodiles (Crocodylus johnsoni) trying to catch Little red flying foxes (Pteropus scapulatus) flying to drink from a watering hole, Kimberley, Western Australia

Ann & Steve Toon / Nile crocodile (Crocodylus niloticus) at night, Zimanga private game reserve, KwaZulu-Natal, South Africa.

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.

Jen Guyton / American crocodiles (Crocodylus acutus) in the Rio Tarcoles, Costa Rica.