Freshwater section of Liverpool Weir.
Sighting and photos (c) charliepbailey.
Field Notes - Dead crayfish next to Lake Magwick on UNE campus. Missing one cheliped. A man once told me he used to catch yabbies in this pond, so I think it's in the genus Cherax. Species is a guess though.
Possibly short-finned.. but more likely to be long-finned.