I thought I'd start this off with one of my own - of which I've caught a few. The Southern Blackfish (Gadopsis marmoratus) which is native to Southern Australia but I caught them in Tasmania many times. I'm not sure how big they grow but I never saw one over about a half pound. Tasmania, where I lived for a few years, has a strange situation with freshwater fish. Apart from the Blackfish there's only a couple of varieties of Galaxias including a spotted variety that looks a bit like a trout. I never caught one of these but apparently there's a growing trend to catch them with flies. Apart from those I think there are only various introduced European freshwater species including, inevitably, Trout. Those introduced into Lake Pedder - which was created, destructively, for a hydroelectric scheme - have grown to enormous sizes, although I've not fished there. Whilst I'm about it, when I lived in Tas in the 70s, in the bush on the west coast, we used to also catch freshwater Crayfish which grew to a fair size. These were equipped with sizeable claws whereas on the marine equivalent, which is abundant off that coast, they are almost vestigial. Both varieties are delicious.... but nowadays you'd be fined a couple of thousand dollars for eating the freshwater variety. I've eaten about $50K's worth.