How do tiny mussels clean our rivers?

Who cleans a river? It turns out some of the hardest workers are animals you may have never heard of: freshwater mussels. Join Tyler Hern from the U.S. Fish and Wildlife Service as we discover how these amazing animals help keep rivers healthy, how baby mussels hitch rides on fish, and why scientists are working hard to protect them. ➡️ Part of the Wild Critters USA series, created with PBS Nature and the National Wildlife Federation ➡️ Learn more about freshwater ecosystems with Ranger...