Distribution:- Northern Australia, India (Eastern coast),South East Asia (now extinct in some parts)
Comments:- Largest living species of Crocodile. Note that this species may occur hundreds of kilometers inland in freshwater.
Usually grows to approximately 4 to 5.5 metres (13–18 ft), sometimes gets to over 6 metres (20 ft)
Estuarine Crocodile (Crocodylus porosus)
This is an ocean going species that can travel great distances (possibly a 100 kilometers or more per week),so saltwater crocodiles occasionally show up where they do not normally occur. For example, they have been seen in New Caledonia, Iwo Jima, Fiji, and the Sea of Japan.
On the East coast of Australia the Rockhampton area is generally recognized and the Southern limit of their range. However they are sighted much further south from time to time.
In Summer 2008/ 2009 some saltwater crocodiles were found on Fraser Island (SE Queensland Australia) but left for warmer waters as the temperature cooled , some have also been found around Brisbane (SE Queensland Australia).
According to naturalist Steve Rushton in an episode of "River Monsters" other sightings have been from the Logan river near the Gold Coast where a 12ft crocodile was once shot, the Brisbane River, Noosa River and Bribie Island, all in SE Qld.
Far north Queensland crocodile expert Gary Zeillfeisch claims crocodiles's lived as far south as Coffs Harbour in New South Wales in the 19th Century, however I'm not sure whether that information can be substantiated