There's an aquarium accessory called Marimo moss balls that people like to put in their fish tanks -- but some moss balls are carrying an invasive species…
A Two for One Special. Moss balls and zebra mussels, by U.S.Fish&Wildlife Alaska
Illegal cannabis grow in Santa Maria cited for environmental crimes
The westward spread of zebra and quagga mussels shows how tiny invaders can cause big problems
Arizona Fish and Wildlife Conservation Office - USFWS
Aquatic Invasive Species U.S. Fish & Wildlife Service
Warning issued for aquarium plant contaminated with invasive species
Aquarium moss balls contaminated with invasive species found in Virginia
ecology
State and Federal Wildlife Officials Would Like You to Please Destroy Your Moss Balls - Route Fifty