They are spending millions and millions to keep them out of the Great Lakes specifically because they know the Asian Carp will kill the fishery there. Even with electo-fences and such, Asian Carp DNA has been found in Lake Michigan so they're getting through somewhere regardless.

Just an FYI...the population has been out of "human" control for years now and unfortunately there's nothing we can do about it...yet. I like the youtube videos of people boating around and shooting them with bow and arrow as they jump out of the water.

Pretty funny video of a reporter in TN - http://www.youtube.com/watch?v=suIVzZb9Pzw