Since their introduction years ago, invasive Asian carp have infested rivers and lakes around the United States.
But they’ve been kept out of the Great Lakes — so far.
Some steps have been taken to protect the lakes system, but many believe that more effective policies — and more substantial barriers — are needed to keep the fish from spreading and to reduce the numbers where they’re already established.
Great Lakes Now
https://www.greatlakesnow.org/2020/10/carp-impacts-invasive-fish-midwest/