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Sea lamprey are parasitic fish that feed on other fish by sucking their blood and bodily fluids, causing significant damage to their hosts and sometimes even death.  Infestations of sea lamprey devastated the Great Lakes fishery in the 1960's and cost thousands of people their jobs making control of their population critical to the health of the Great Lakes.  This weekend the U.S. Fish and Wildlife Service will be treating select areas of the Shiawassee River with lampricides as a part of their efforts to control the sea lamprey population.  The treatment may cause the water to take on a yellow tint but it should be safe for normal recreation activities.  For more information on the efforts to control sea lamprey please click the links below:

Lampricides and Sea Lamprey Control - Great Lakes Fishery Commission