Destructive non-native mussel larvae discovered in Montana waters

Tiber Reservoir east of Shelby has tested positive for the larvae of aquatic mussels, a tiny invasive species with a hard shell that can cause big impacts to boats, fish and water infrastructure such as hydroelectric dams.

Tests from Canyon Ferry Reservoir near Helena also show “suspect,” but inconclusive, results for mussel larvae, according to officials at Montana Fish, Wildlife and Parks.

It’s the first time the larvae of quagga or zebra mussels have turned up in Montana waters.


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