From the Milwaukee-Journal Sentinel:

In the wake of a government news release that pointed a finger at humans for planting an Asian carp near Lake Michigan, facts are coming to light that indicate Illinois officials may have stretched their own science to sell a whopper of a fish tale.

When netting crews hunting for Asian carp above an electric barrier on the Chicago canal system in June pulled a three-foot long, 20-pound mature bighead carp from Lake Calumet – just six miles south of Lake Michigan – the question was: How did it get there?

If it swam on its own, that would spell trouble for Lake Michigan because it could indicate that the electric fish barrier about 35 miles downstream from the lake was not doing its job, and more fish had perhaps breached this last line of defense.

If it were determined that the fish got there with human help, then it could more easily be explained as an isolated find, and not evidence that additional steps should be taken on the canal system to protect the Great Lakes. Read more.