Zebra mussels on Marimo moss balls are causing an emergency in WA

Seattle, Washington, United States

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Moss balls imported from Ukraine to pet shops in the United States have been found to house the invasive Zebra mussel. Once in bodies of water, this mussel reproduces rapidly and wreaks havoc on ecosystems.

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Participants in the Lake Roosevelt Invasive Mussel Response Exercise in the fall of 2019 deploy mock chemicals into the water. (Washington State Depaartment of Fish and Wildlife/Washington Invasive Species Council.)