Marimo moss balls sold at pet stores have been found to be contaminated with Zebra mussels.

State warns of invasive zebra mussel found in aquarium moss balls sold in stores, online - OBX Today

UPDATE to Consumer Alert: Aquarium Moss Balls May Contain Invasive Zebra Mussels - N.C. Wildlife Resources Commission

Avoid moss balls from Ukraine - OATA - The Ornamental Aquatic Trade Association

Zebra mussels found in Rapid City pet store moss balls

A Two for One Special. Moss balls and zebra mussels, by U.S.Fish&Wildlife Alaska

Conservation Officer Service - UPDATE The Conservation Officer Service can confirm zebra mussels have been found on moss balls in Terrace. CO's collected the contaminated moss balls today, after a woman

Zebra Mussels Found in Aquarium Moss Balls - NAISMA

Marimo moss balls sold at pet stores have been found to be

Zebra mussels found in moss balls shipped to pet stores in several states, including North Dakota

Pest alert: Invasive zebra mussels arrive in Oregon in moss balls sold for aquariums

Zebra mussels in moss balls a concern in Texas - AgriLife Today

Marimo - Wikipedia

DNR: Popular aquarium product sold in Iowa may contain invasive zebra mussels – Homegrown Iowan

Zebra mussels found in Wyoming pet stores