Invasive zebra mussels have recently been discovered in aquatic moss balls sold for aquariums in Renton, Washington, raising concerns about the potential environmental and infrastructural damage they could cause. The mussels, originally native to freshwater bodies in Ukraine, are known for their ability to multiply rapidly and disrupt ecosystems. Becky Elder, spokesperson for the Washington Department of Fish and Wildlife, emphasized the importance of preventing these invasive species from entering Washington’s waters.
Zebra mussels were first introduced to the United States in the 1980s, likely brought over by transoceanic vessels that discharged ballast water into the Great Lakes. Cole Morrison, the invasive species program manager for the Idaho State Department of Agriculture, explained that the microscopic larvae of the mussels were transported in the water and found no natural predators in America. Over the years, zebra mussels have proliferated in the Great Lakes, causing significant problems by clogging pipes and infrastructure.
In 2021, a new pathway for zebra mussels to enter the states emerged when they were discovered hitching a ride on Marimo moss balls. These moss balls, which are naturally found in Ukrainian water bodies, are popular in aquariums due to their attractive appearance. Justin Bush, invasive species coordinator for WDFW, highlighted the potential financial impact of zebra mussels contaminating hydroelectric facilities, estimating a cost of $100 million per year to keep them operational.
The concern with zebra mussels extends beyond their impact on infrastructure. Morrison expressed worries about the possibility of contaminated moss balls being released into local waterways by aquarium owners. The rapid reproduction rate of zebra mussels means that even a small number can quickly multiply and outcompete native species for resources, leading to imbalances in the ecosystem.
Efforts have been made to prevent the spread of zebra mussels, including federal policies to limit the importation of infected Marimo moss balls. Inspections of pet stores in Washington and Idaho are ongoing to check for the presence of zebra mussels on moss balls. Derek de Haas, a watercraft inspector, is responsible for ensuring that invasive species do not enter Washington on boats, as zebra mussels can survive for up to 23 days out of the water.
Proper disposal methods for zebra mussels on moss balls include boiling, freezing, or soaking in vinegar before disposal. Decontamination procedures for aquariums and accessories are also recommended to prevent the spread of invasive species. The importance of vigilance in monitoring and preventing the spread of zebra mussels cannot be overstated, as the consequences of their introduction into local waterways could be devastating.
In conclusion, the discovery of zebra mussels in moss balls sold for aquariums serves as a reminder of the ongoing threat posed by invasive species. It is crucial for individuals and authorities to work together to prevent the spread of these harmful organisms and protect the delicate balance of aquatic ecosystems. By staying informed and following proper disposal and decontamination procedures, we can help safeguard our waterways from the destructive impact of zebra mussels.
