Agree with 15....
It isnt a good thing at all, but it happened... So here we are. We have anacondas in the everglades, Iguanas in the keys, Zebra muscles. Asian Carp in our rivers... There are several other examples... (Snakeheads in the patomic, great lakes etc..) Fight it, make the attempt, and if that fails? We have to live with the results, good, bad or indifferent.