Officials are urging Mainers to destroy their aquatic moss balls after zebra mussels were found living in them at pet stores in central and southern Maine. Zebra mussels, a restricted/prohibited species in Maine, can “outcompete native species, and clog boat motors, hydropower structures, intake pipes and other in-water structures” if released into the wild, according to a DIF&W spokesperson. The mussels have been found on moss balls that are labeled “Beta Buddy Marimo Balls,” “Mini Marimo Moss Ball and “Marimo Moss Ball Plants” in pet stores.