Electrified barriers have been set up to keep them from entering the Great Lakes to stop the intrusion. However, new water testing in Calumet Harbour on Lake Michigan indicates the carp may have breached the barriers.

"The finding that there was in fact silver carp DNA in the Calumet Harbour is troubling for a lot of people because it fits this pattern of the carp moving north and getting through the electric barrier," said Dan O'Keefe of Michigan Sea Grant.
Voracious eaters

Asian carp are voracious eaters and compete for food with the fish most North Americans like to eat. Moreover, the warmer and shallower waters of Lake St. Clair and Western Lake Erie would make ideal spawning grounds for the fish, said Michael Hansen of the Great Lakes Fishery Commission.