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Drainpipe cause of New Zealand mudsnails at FWP fish hatchery

The Bluewater Fish Hatchery, located near Bridger in southcentral Montana, is a trout hatchery and is the third largest production facility in the state. This is the first time New Zealand Mudnsails (NZM) have been found at an FWP hatchery.

Wednesday, September 9, 2020
Categories: AIS News

Non-Residents Launching Boats in Montana

Watercraft owners are reminded that they must stop at ALL open inspection stations.

Friday, September 4, 2020

Anglers Can Help Prevent AIS

Aquatic invasive species (AIS) threaten Montana’s waterways and fisheries. AIS are plants, animals and pathogens that are not native to Montana and cause harm to Montana’s native plants, animals and fish. AIS populations can reproduce quickly and spread rapidly because there are no natural predators or competitors to keep them in check.

Friday, September 4, 2020
Categories: AIS News

Kayak with mussels stopped in Nashua

Montana’s watercraft inspectors intercepted the 27th mussel-fouled vessel for the year.  Last Sunday, vacationers traveling from Michigan to Glacier National Park with a kayak strapped on their van stopped at Nashua inspection station where inspectors found a zebra mussel attached to the kayak’s hull.  The kayak had last been in Michigan’s Lake Cadillac, a known mussel-infested waterbody.  Inspectors thoroughly decontaminated the kayak before sending the vacationers on their way.

Friday, September 4, 2020

New Zealand mudsnails found at FWP fish hatchery

New Zealand mudsnails were detected at Montana Fish, Wildlife & Parks’ Bluewater Fish Hatchery on Tuesday, Aug. 18. This is the first time FWP has detected mudsnails in a state fish hatchery.

Friday, August 21, 2020
Categories: AIS News

What boat owners should know about AIS

Aquatic invasive species (AIS) are non-native plants, animals or pathogens that can invade new waterbodies by hitching a ride on watercraft and gear. AIS can include mussels, snails, fish, plant fragments or larva that can only be viewed under a microscope.

Wednesday, June 3, 2020

Inspection reminder for recreational and tournament boat owners entering Montana

With the many fishing tournaments coming up this summer ALL boaters are reminded to stop at ALL watercraft inspection stations. In addition, all watercraft entering Montana are required to be inspected for aquatic invasive species and must obtain an inspection before launching on Montana waters. Remember, this includes not only nonresident boats entering the state, but also resident boats that were taken out of state and are reentering Montana.

Wednesday, June 3, 2020

Inspectors find more boats transporting invasive species into Montana

Montana watercraft inspection stations have intercepted 13 boats carrying invasive mollusks into the state this year. As of May 30, inspectors have caught 12 boats with invasive zebra or quagga mussels and one boat with red rim melania snails attached to watercraft.

Wednesday, June 3, 2020

Ballast boats need extra attention to stop AIS

Boat owners transporting watercraft with ballast tanks will undergo additional cleaning at watercraft inspection stations to prevent the spread of aquatic invasive species.

Friday, May 22, 2020

New AIS rules for nonresident boaters and anglers

Nonresident boaters and anglers will see new aquatic invasive species rules when they visit Montana this year. 

Friday, May 22, 2020



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:

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