Asian carp, an invasive species in northern Illinois, may be declining. That eases the concern of them spreading into the Great Lakes.
But the area’s not out of the woods yet.
Matt O’Hara, an Asian carp project leader for the Illinois Department of Natural Resources, says the carp can ruin the ecosystems in the Illinois River and its tributaries. That’s because they eat the same food that other native species – such as big-mouth bass – live on.