Science & EnvironmentNorthwest wildlife agencies warn of invasive zebra mussels in retail marimo ballsBy Bradley W. Parks (OPB)Bend, Ore. March 4, 2021 9:52 p.m.Zebra and quagga mussels can quickly establish in watersheds, wreaking havoc on the food chain.📨 Daily news in your inboxSign up today for OPB’s “First Look” – your daily guide to the most important news and culture stories from around the Northwest.EmailPlease leave this field blankSign up