I can now say with excitement that the crocodile named "Lolong" has been scientifically confirmed by a team of National Geographic as 20 feet 3 inches, which is about 6.2 metres!

This crocodile is now one of only three that have ever been scientifically confirmed as being over 20 feet in length. And from those three specimens this is the only one that has been captured alive. Until recently the only image that was available was that of the skin of a 6.2 meter specimen from Papua New Guinea. It's interesting that these three specimens were all about 6.2 metres.

This is the one of which only the skin was photographed:



And here is a short video about salwater crocodiles which pretty much covers everything you need to know about them in a nutshell:

http://abcnews.go.com/Nightline/video/national-geographic-king-croc-12301378

What makes these animals so succesfull is the way they are able to sustain themselves. They were almost hunted to extinction and by the 1960s it was estimated that there were only a few thousand left in Australia. But in the 1970s they were declared as protected species and since then they made a remarkable comeback. There are now over 150000 in Northern Australia alone.