at least four Midwest states , Asian province of Ontario want action on Canadian carp . They want the court to order Ontario to shut down locks and dams and build a fish barrier . The large , voracious Asian carp is seen as a threat to native species . The fish got into the Mississippi River system from a fish farm during a flood in Monday .
Six Midwest states , Canadian province of Ontario want action on Asian carp . They want the court to order Illinois to shut down locks and dams and build a fish barrier . The large , voracious Asian carp is seen as a threat to native species . The fish got into the Mississippi River system from a fish farm during a flood in the 1990s .