Many choices - Empire Gudgeons, Ambassis Glass Fish / Glassy Perchlets, Hardyheads. If you want to do your bit to help an endangered species Honey Blue Eyes are an option - they are protected and can't be bought or sold however there are members on here in Bris that breed and may give you some. Another fish to consider Rhadinocentrus ornatus - only a matter of time before they too become endangered - some populations already wiped out. Don't catch in the wild - plenty of locally bred fish in SEQ. Just put one species per pond if using either of the latter.