Asian Carp knocking on the Door to Lake Michigan

Stopping Asian carp might be like trying to undo the opening of Pandora's box.
If or when they establish themselves in the Great Lakes, say goodbye. Possibly the largest ecological disaster in United States history. You just have to love man's unending fooling around with mother nature.

Good article and background information here: http://www.usatoday.com/news/nation/2009-11-30-asian-carp_N.htm