Aquatic Invasive Species

Aquatic Invasive Species (AIS) are plants, animals, or pathogens that are not native to Montana and can cause harm to our 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.

Prevention is our best defense!

Once established, there are few if any means to control AIS in natural waterbodies.  Control efforts are very expensive and total eradication is very unlikely.

You are the first line of defense in preventing the spread of aquatic invasive species.

AIS Bureau, Montana FWP
1420 East Sixth Avenue
Helena, MT 59620
Phone: (406) 444-2440

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To protect Montana’s waters and native aquatic species, please follow these rules and guidelines:

Clean Drain Dry

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