I once went bush waking (with a friend) through Guy Fawkes National Park. We camped at Marengo Creek near where it joins Guy Fawkes River in New South Wales : 30.125211 degrees South, 152.301443 degrees West.
I went for a swim in the creek in a large basin. The circular hole was made made by a fallen tree when its roots lifted from the earth. As I cooled off in the water up to my neck, small fish swam up and began to nibble at my skin - it was a strange tickling sensation and very enjoyable.