Crocodylus Porosus is the species name for the saltwater crocodile, also known as the current largest of all living reptiles. The word "crocodylus" derived from the Greek word krokodeilos which means literally "pebble worm" (kroko = pebble; deilos = worm, or man) referring to the appearance of a crocodile. "Porosus" derived from porosis (Greek for "callosity") + osus (Latin for "full of"), referring to the bumpy upper surface of the snout in large adults .