In this energising conversation with estuarine ecologist Dr. Alan Cottingham from Murdoch University, we dive into the surprising world of mussels—nature’s quiet achievers. From the long-lived Carter’s freshwater mussel to tiny pigmy mussels capable of filtering thousands of litres of water per hour, Alan reveals how these humble creatures play a vital role in keeping our aquatic ecosystems healthy. We explore their fascinating life cycles, including their parasitic larval stage, and how cutting-edge technology like Spy Valve is turning mussels into real-time water quality monitors. With nearly half of freshwater mussel species under threat, Alan shares hopeful stories from the frontlines of mussel reef restoration and how smart science, community collaboration, and a bit of creativity can help turn the tide. Whether it’s restoring lost habitats, preventing fish kills, or inspiring the next generation of scientists, this episode shines a light on the extraordinary impact of some of the ocean’s most underrated heroes.