Juvenile silver carp 80 miles from Lake Michigan

Hundreds of juvenile silver carp, four to six inches long, were found in the Marseilles Pool of the Illinois River about 80 miles from Lake Michigan, indicating a potential upstream spawning event and prompting intensified monitoring, electrofishing, and upcoming commercial removal efforts in the upper river and tributaries. The discovery coincides with delays in the Brandon Road Interbasin Project barriers, drawing criticism from Illinois officials and highlighting concerns about protection of the Great Lakes from invasive carp.