I'm with Steve re: the shrooms and an Anguilla. Highly unlikely they would be that far south being a tropical species.
Steve, pbass are going gangbusters. Some have next to no markings except a tail occeli, others showing three spots on the side (not bars) and tail oceli. I sold four to my boss who is growing them out in his 5000L pond. Will be interesting to see how they develop.
Went and looked at a house this arvo, pretty much ticks all the boxes to buy it. Built around a courtyard with a 6m x 2.5m palm garden in the middle. Perfect to piss off the palms and dig out as a pond for the gars and pbass. That or convert the swimming pool out back. Or both! Hmm, time to talk to the bank.