Zebra Mussels and Other Nuisance Species

---Help Protect the Middle Fork of the Salmon River--- 

Clean boats = Clean waters 
            Prevent aquatic hitchhikers from catching a ride on your boat and equipment………….

Zebra Mussels in the West!!  Mature zebra mussels look like small D-shaped clams.  Their yellowish-brown shells have alternating light and dark stripes.  Average length is often one inch or less. 

            Zebra Mussels are changing water resources across most of the nation and have now invaded the west.  The filter feeding mussel colonies process large quantities of water.  This water filtering action and the physical build-up of colonies negatively alters aquatic ecosystem functions. 

            Zebra Mussels have traveled across the United States with boaters like you and me!!  Mussels and mussel eggs often attach themselves to boat and equipment surfaces.  They are now established in some of America’s most popular rivers and destinations.

  • Colorado River, Grand Canyon National Park!!
  • Western Washington and Southern Montana!!
  • Lake Mead National Recreation Area
  • Lake Powell
  • Mississippi River system
  • Great Lakes

Don’t Forget Non-Native Plants!!  Noxious/Invasive, non-native plants are also transported by clinging to boats and equipment, especially vehicles. 

Do Your Part
Before Moving Your Boat from One Water to Another

  • Inspect & Remove aquatic plants and animals
  • Dispose of unwanted bait and trash
  • Drain water
  • Dry boat for 5 days OR
  • Rinse boat and equipment with hot &/or high pressure water

Stop Aquatic Hitchhikers!