Quagga and Zebra Mussels
Quagga (Dreissena rostriformis bugensis) and zebra (Dreissena polymorpha) mussels are invasive freshwater mussels that were first found in North America in the Great Lakes in 1988. These species are native to the freshwater rivers and lakes in Eastern Europe and western Asia (Eurasia) including the Black, Caspian, and Azov Seas (zebra mussel) and the Dneiper River drainage of Ukraine and Ponto-Caspian Sea (quagga mussel).
This website section provides a brief introduction to Eurasian Mussels in the following segments:
Eurasion Mussels 101: Profile of an Extreme Invader
How Did They Get Here? Eurasian Mussel Transport to and Within the United States
Where are They in California?