iNaturalist's AI suggested Microclona limodes (A NZ species), but I note M. characta apparently occurs in Australia and NZ. BOLD4 shows several Microcolona (genus) species as occurring in Australia. all not named to species level:- https://v4.boldsystems.org/index.php/Taxbrowser_Taxonpage?searchMenu=taxonomy&query=Microcolona&taxon=Microcolona I have found no other photos from life online to compare this sighting with.