The perfect alien invasion: Mark Hixon talks predation at TEDxYouth event

[youtube]http://www.youtube.com/watch?v=YiMTGAbCRV8[/youtube] Arnold Schwarzenegger battled the ultimate foe in the movie Predator and that dread-locked alien with the nasty teeth proved to be dreadfully  lethal for humans and unfortunately, many organisms in the Atlantic Ocean are facing the same kind of alien predator — the lionfish.…