These freshwater Crayfish are found in only Lamington and Sprinbrook National parks. The same species can be found in other areas but are a dull red/brown. They are often found on the walking track especially after major rains. This fellow was about 150mm long. Springbrook National Park is mostly Sub-tropical Rainforest at a elevation of 1000m (3300'). There had been more than 600mm of rain over three days when I found this Cray.
Yes, the colour is natural, I didn't buy one at the shop and paint it.