It was described and identified by a CSIRO scientist who released it into the Murrumbidgee River (according to the same CT article). It was amazingly distant from the Molonglo like another observed in the ANBG.
I thought it interesting and hope it is acceptable as a rare early record of Rakali in the ACT, not my photo of course. That it was released is also interesting.
We've always said that the data is the most important thing (not the actual image). If you have a trusted source, then it's definitely valuable distribution data.