Close up of a large salt water crocodile (scientific name Crocodylus), Queensland Australia, the closest I’ve ever been to a croc and I thought he was beautiful. Canon EOS 5D Mark II, Canon 70-200mm L IS lens. CLICK ON PIC TO VIEW LARGE.
They first appeared during the Eocene epoch, about 55 million years ago.
Crocodiles are very fast over short distances, even out of water. Since they feed by grabbing and holding onto their prey, they have evolved sharp teeth for tearing and holding onto flesh, and powerful muscles to close the jaws and hold them shut. These jaws can bite down with immense force, by far the strongest bite of any animal. The jaws are opened, however, by a very weak set of muscles.