Yes, love them, not to eat, though the Italians do eat them. Best haul I ever got was around 50 lb on a slider. Every species was brought out from the UK in the early settlers years, the only ones to survive were carp, tench, roach and perch. We do have another species of carp which is called the European carp but I believe comes from Asia, spreads like wild fire and is now a pest. One of my dogs in the spring would pick them out of the shallows in his jaws the water was that thick with them.
The fisheries over here are going to bring out the virus from the UK which you are trying to eliminate, herpes virus, Australia doesn't have a good record when it comes to eliminating pests, look up Cane toad.