Every weekend, and some weekdays too, you'll find Mudcrabs along the banks of the Cooks River. Not crustaceans, although they're slowly returning as their habitat is restored, but a group of dedicated volunteers who are rehabilitating what was once the most polluted river in Australia. [audio src="https://open.acast.com/public/streams/610bcc3f748075bae1971e6f/episodes/62aa8cf97c3e450012bbede7.mp3"][/audio]