What do you know about the saltwater crocodile? Well, from its name you can tell it lives in salt water, although it can live in fresh water, too. Did you also know it's a reptile, like a snake or a lizard? In fact, the crocodile is the largest living reptile in the world! As it's a reptile, the crocodile is cold-blooded, and needs to sun itself every morning in order to have the energy to go about? its daily activities. It takes a lot of heat to warm up this big animal. The males can grow up to seven metres long and can weigh about 1,000 kilograms. The females are about half that length and weigh less, too The crocodiles are usually found at river mouths in the coastal regions of eastern India, Southeast Asia and northern Australia. These reptiles are excellent swimmers and have often been seen far out at sea. They can also stay under water for as long as 5 hours. However, they can easily spring into action and use their powerful tails to propel them quickly through the water.