Duluth stores find moss infested with zebra musselshttps://www.duluthnewstribune.com/news/science-and-nature/6947298-Duluth-stores-find-moss-balls-infested-with-zebra-mussels Publication Date 03/22/2021 Source Duluth News Tribune Programs and Outreach Projects Aquatic Invasive Species Campaigns Healthy Coastal Ecosystems Program Mention Type Interview