It's possible, anything's possible... About a year ago while I was still living in Sydney we were house hunting and during a house inspection I found a bluey in the backyard, it was pure white with grey bands and no trace of any other colour. At the time I didn't know much about blueys but if I'd known an abnormal bluey like that was so rare I wouldn't have let it go! Still kickin' myself for it now...
Blueys are pretty fast i was driving down my street yesterday and i seen a bluey on the road so i stopped the car to move it then bang its started running and it climbed up the gutter and ran into the bush. So i was happy it was off the road.
call me old fashioned but ,im stil not convinced,a jet black bluey,in an area where a land mullet could be possible.
i have gone herping around that area alot i lived at wahroonga
i did find some scaley foot legess lizards