In Australia, they are considered efficient at dumb tourist disposal.
He's a big bastard, that's for certain. The largest saltwater croc ever found was dead and, due to shrinkage, was estimated to be 21.3 feet long. Larger ones have been reported...but never verified. Of course, the fact that they're six metres long, a ton in weight and like snacking on humans has complicated these matters somewhat.
The scariest thing about them, for me, apart from the fact they hunt sharks, is that there are reports that they are actually very intelligent, and faster at learning than rats.
Also, could you imagine seeing one of these while surfing or swimming somewhere? I'd shit bricks, and no mistake.