Clean. Drain. Dry.

Aquatic Invasive Species

Aquatic invasive species are plants, animals, and pathogens that are not native to Montana and can cause harm to the environment and economy. 

AIS are introduced accidentally or intentionally outside of their native range. AIS populations can reproduce quickly and spread rapidly because there are no natural predators or competitors to keep them in check. AIS can displace native species, clog waterways, impact irrigation and power systems, degrade ecosystems, threaten recreational fishing opportunities, and can cause wildlife and public health problems.

Montana Fish, Wildlife, and Parks

How You Can Help

Clean: Completely remove all mud, water, and vegetation before leaving the access area.
  • Cleaning will remove visible large-bodied organisms attached to or in watercraft or recreational equipment. Rinsing with water removes organisms, while hot water often kills them.
    • Water at least 120°F is recommended; be sure to avoid contact with skin and check manufacturers’ recommendations to ensure equipment can withstand high temperatures.
    • If hot water is not available or may cause damage, rinsing with tap water and completely drying will help prevent the spread of aquatic invasive species.
  • Inspect your boat, trailer, and all gear. Pay attention to crevices and hidden areas.
  • Remove all mud and vegetation. Use a pressurized power sprayer found at most do-it-yourself car washes. The hot water kills organisms and the pressure removes mud and vegetation. No need to use chemicals or soap.
  • Dispose of vegetation and debris in a trash or on dry land away from water or ramp.
Drain: All water from watercraft and equipment.
  • Draining removes small and nearly invisible organisms such as invasive mussel larvae (veligers) that can be found in standing water.
  • Drain or remove water from the boat, bilge, live well, engine, internal compartments, and bait buckets by removing drain plugs before leaving the access area.
Dry: All watercraft and equipment. Invaders can only survive in water and wet areas.
  • Dry your watercraft and fishing equipment thoroughly; this will kill most invasive species. The longer you keep your watercraft, trailer, waders, and other equipment outside in the hot sun, the better.
  • Drying is necessary as many organisms can survive in standing water.
  • Dry in the sun (drying times will vary) or use a towel.




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Instruction Card and Coloring Pages

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