05/28/2026
That’s not a dinner plate. That’s a cluster of invasive mussels that are hitching a ride on a boat propeller.
Springtime in Washington means boats, paddles, waders, and weekends on the water. It also means risk—especially from invasive freshwater mussels.
These tiny hitchhikers don’t wait for an invite. They latch onto boats and gear, which can innocently transport invasive species from one waterbody to another.
These mussels could cost taxpayers hundreds of millions of dollars a year and close access to state waters for recreation and commercial opportunities and clog water intake pipes and filters, reducing water pumping capabilities for power and water treatment plants.
Once established, they will change ecological systems and food sources critical to native mussels and species such as salmon and trout.
Before you head to your next lake or river take three simple steps:
1. Clean all equipment that touched the water of plants, algae, animals, and mud.
2. Drain all water (live wells, bilge, buckets) before you leave.
3. Dry everything completely before your next trip to a waterbody.
Nothing ruins a perfect Washington lake faster than an invasive species that never leaves.
Image courtesy of Government of Alberta