Zebra Mussel Cluster
Photo taken by D. Jude, Univ. of Michigan.
"Zebra mussels (Dreissena polymorpha) are among the most devastating aquatic invasive species to invade North American fresh waters. Native to the Caspian Sea region of Asia, zebra mussels reached the Great Lakes in the mid-1980s in the ballast water of a ship. Since their arrival, zebra mussels have spread rapidly throughout the Great Lakes and into several major river systems of the eastern United States, including the Ohio. Illinois, Mississippi, Mohawk, Hudson, Susquehanna, Tennessee and Arkansas rivers. Populations are now known from at least 23 states, primarily within the Great Lakes and Mississippi River watersheds."
Please note that this image is not the property of USFWS, it has been collected from Flickr Creative Commons and has its own individual copyright notice that must be followed. Thank you.