I am familiar with this species. Female below. Male above. This school was in the shallows of water backed up from the blockage in the Sullivan's Creek silt trap near Barry Drive. I doubt that this species is permanent in the Sullivan's Creek, Turner (see CPCN map). The nearest permanent upstream population is the pond near the O'Connor shops. There are physical obstacles to upstream movement from the ANU sections of Sullivan's Creek into the silt trap. That said, I have not seen this species in the ANU sections of Sullivan's Creek.