This undated photo provided by the U.S. Geological Survey shows a Eurasian ruffe, which is an invasive fish whose DNA has been detected in Chicago-area waterways. (AP Photo/U.S. Geological Survey, ...

The ruffe is native to Central and Western Europe, but now it's poised to invade the Mississippi system.Getty Images Conservationists and wildlife officials have been policing the porous border ...

An invasive fish species that is capable of massive eco-destruction has been spotted in Ontario, and aside from reporting sightings of the fish, experts are recommending anglers to kill them on sight.

Invasive species of fish spotted in Sault area An invasive species of fish called the Eurasian ruffe has been spotted in St. Marys River near Sault Ste. Marie.

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