On June 26, 1959, the St. Lawrence Seaway opened for activity. (See our other article today.) The seaway opened the Great Lakes to maritime tankers upgrading the economy of the locale and transportation productivity for the US and Canada. Tragically, it likewise brought obtrusive species. Once in a while obtrusive animal types are brought to another land or water deliberately, different times unintentionally. Regularly, the presentation of a non-local animal groups has undesirable outcomes for their new home and neighbors, be they plant or creature. Here we rundown 10 of the most disturbing (to us; it is a matter of assumption when its all said and done), if not the most destructive intrusive species. Which ones would you include?