I've heard alot of croc stories over the years. Been told they are in the Maroochy River, around Moreton Bay, breeding off Bribie, escaping from croc farms ... If that was the case, more people/dogs would be getting eaten/bitten and they simply aren't. Only the girls stay the same size, the boys all get larger and larger and larger till you have something the size of Sweet Heart (trust me that's *#$^@&*$ Huge).
When I lived in Darwin for awhile, I did see the effects they have on ... well fishing boats really. A mate of a mate took his tinnie out fishing and a croc tried to eat the tinnie ... I saw the holes but didn't see the croc. I was told to always check our dam before just jumping in as crocs will travel during night hours till the sun comes up to change water holes ... I threw a rock in each time I wanted to enter the water as my dog loved the water and I didn't want either of us eaten. Remember in Croc Dundee where the croc gets the sheila by the water bottle and Mick stabs it in the head? We lived less than 5 minutes from there and I never saw a croc in that pool, but I did see many fishermen.
The NT News even reported one in the local pool at Casuarina one day ... no one was allowed to enter the premises till it was removed. It was a blowup one that someone had filled with water and sunk as a lark, but they take these things very seriously up there. The last year I was there (1998) they took over 300 crocs out of the harbour (but keep in mind it's a huge harbour) and it didn't stop people swimming in it ... but the water was horribly murky so I never gave it a try.
Saw more snakes up there than I did crocs.
Kit_e