Hundreds of young invasive silver carp have been pulled from the Illinois River at a location where their presence carries a different significance from the discovery of another adult fish. The fish were only a few inches long, suggesting that reproduction may have occurred farther upstream than previously documented and bringing the invasive species closer to Lake Michigan. According to WTTW Chicago, sampling crews with the Illinois Department of Natural Resources removed hundreds of young silver carp, measuring about 4 to 6 inches long, from the Marseilles Pool of the Illinois River. The site is only about 80 miles from Lake Michigan. While adult invasive carp had previously been detected this far north, the discovery of juveniles is significant because their presence indicates that spawning has occurred, potentially farther upstream.
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