AP photo
In this undated file photo, the invasive species silver carp, a variety of the Asian carp, is pictured by the Illinois River in central Illinois. Tests have found signs of Asian carp in the Mississippi River north of the last major physical barrier keeping the invasive species of fish from spreading into many of the state's most popular central and northern lakes, officials said Thursday.
Read the article: Carp fight in high gear as fish head north
