Researchers say a fatal fish virus has been found in Lake Superior for the first time, meaning it has spread to all the Great Lakes.
Cornell University scientists said Wednesday they detected viral hemorrhagic septicemia, or VHS, while testing fish from seven Lake Superior locations.
VHS has been identified in 28 Great Lakes fish species since 2005. It has caused large fish kills in lakes Ontario, Erie and Huron. It also has turned up in Lake Michigan.
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