On this trip we did the Tourist Section - and we saw a platypus swimming through one of the pools. It swam around our lilos for about 10 minutes - and did not seem too scared of us. Quite remarkable! On a much earlier trip (1970's) - I saw a platypus in October Creek (one of the entry routes into Clatterteeth Canyon) - but it quickly vanished from view.
Unfortunately the photos are not too good.
Above - the platypus is just in front of the girl on the lilo
Above - the platypus is just near the rock in the middle of the photo
Above - Part of the party in the canyon
(L-R, ?, Roger Lembit, ?, Dylan Sutton, Ashley Burke, ?, Danny Yee, ?, ? ,?,?)