This is from the last paragraph from the following page:

http://www.rook.org/earl/bwca/nature...omyzoncas.html

The native lamprey species of the genus Ichthyomyzon should not be confused with the exotic and destructive Sea Lamprey (Petromyzon marinus), which wreaked havoc with native game fish in the Great Lakes before vigorous control measures brought it to check. The native lamprey have evolved with, and live in balance with, their host populations.
Status
Identified as a vulnerable species in adjacent boreal Canada.
Listed as a species of special concern in Georgia, Kentucky, Nebraska
Listed as Threatened in Iowa and Kansas

http://www.rook.org/earl/bwca/nature...omyzoncas.html