Editing Marimo (section)

==Contamination==
On 2 March 2021,<ref name="USGS-moss-zebras" /> the [[United States Geological Survey]] was notified that [[zebra mussel|zebra mussels]] had been discovered in moss balls sold in pet stores across North America.<ref>{{cite web|url=https://www.fws.gov/fisheries/ANS/zebra-mussel-disposal.html|title=Zebra mussel disposal|website=FWS|date=26 April 2021 }}</ref> By 8 March, invasive zebra mussels had been detected in moss balls in 21 states.<ref name="USGS-moss-zebras">{{cite web|url=https://www.usgs.gov/news/invasive-zebra-mussels-found-pet-stores-21-states|title=Invasive Zebra Mussels Found in Pet Stores in 21 States|website=USGS}}</ref> These discoveries were prompted by the initial find at a [[Seattle]] [[Petco]].<ref name="WashDeptFish" /> Owners of fish tanks were urged to decontaminate the moss balls by boiling, freezing, or bleaching them before disposing of them to prevent spread to local waterways.<ref name="WashDeptFish">{{cite web | title=State asks public to inspect aquarium moss and prevent movement of invasive mussels | website=[[Washington Department of Fish and Wildlife|Washington Department of Fish & Wildlife]] | date=2021-03-04 | url=http://wdfw.wa.gov/news/state-asks-public-inspect-aquarium-moss-and-prevent-movement-invasive-mussels | access-date=2021-04-27}}</ref> Petco<ref name="Petco-moss">{{cite web | title=Recalls & Advisories | website=[[Petco]] | url=http://www.petco.com/content/petco/PetcoStore/en_US/pet-services/help/recalls.html | access-date=2021-04-27}}</ref> and [[PetSmart]]<ref name="Petsmart-moss-balls">{{cite web | title=Voluntary Product Withdrawal: Marimo Moss Balls | website=Heart of [[Petsmart]] | date=2021-03-06 | url=http://www.petsmartcorporate.com/product-notices/voluntary-product-withdrawal-marimo-moss-balls/ | access-date=2021-04-27}}</ref> voluntarily recalled moss balls in their stores. If the mussels reach open water in [[Washington (state)|Washington]], they could cost the state $100 million each year in maintenance for power and water systems.<ref name="WashDeptFish" />