Zebra Mussels

Once they are drawn into a pipe filled with water, they can grow and clog the pipe until the water stops flowing.Females can lay over one million eggs in a spawning season.They attach themselves to a usually hard surface and are
Zebra mussels were first discovered in Lake St. Clair in 1988. Lake St. Clair is located east of Detroit, Michigan, between Lake Huron and Lake Erie.  
Zebra mussels are native to fresh water rivers and lakes in Eastern Europe and western Asia. In 1769, Pallas first described populations of this species from the Caspian Sea and Ural River in Russia.
Zebra mussels have spread rapidly throughout the Great Lakes region and in the large navigable rivers of the eastern Mississippi drainage including the Mississippi, Tennessee, Cumberland, Ohio, Arkansas, and Illinois rivers.
Zebra mussels have caused negative shifts in zooplankton populations in the Great Lakes and have nearly wiped out all native mussels in western Lake Erie and Lake St. Clair. No one has been able to come up with any commercial use for them so far.