Wherever you go now, chances are you will encounter invasive species. Many are benign, but quite a few,are not. Currently I am part of an organization working to formulate a defence against Asian Carp in the Great Lakes. Not the easiest challenge but an important one. One thing anyone can do is to help prevent the spread of aquatic invasive species simply by your watercraft for weeds and possible aquatic hitch hikers when moving watercraft from one body of wager to another. A five minute check can save a lifetime of grief.