"By interfering with mottled sculpin reproduction, the round goby may have a negative impact on the food supply of yellow perch, an important sport fish in Lake Michigan.

CLEVELAND – The latest threat to the fragile health of Lake Erie doesn’t come from chemical spills, algae blooms or raw sewage. It comes from a gray, 6-inch fish. This is a fish with an… ...

"By interfering with mottled sculpin reproduction, the round goby may have a negative impact on the food supply of yellow perch, an important sport fish in Lake Michigan.

The round goby, a Eurasian fish that has invaded the Great Lakes, is causing the decline of the mottled sculpin by displacing the native from its spawning sites.

LANSING – Can invasive species be good news – rather than bad – for native fish in the Great Lakes?

Meanwhile, the native goby - called a sculpin - has two separate pelvic fins, its body has a mottled color pattern with a cream-colored belly, and has no scales.