source: http://media.comicvine.com/uploads/3/38687/877172-alienwarrior_large.jpg
Aliens (or Xenomorphs as they are formerly known) are living, breathing weapons with absolute adaptability, no fear, and no mercy. They will destroy anything that attacks them. With their acidic blood, tongues with teeth and tails that can kill, Xenomorphs are one of sci-fi's most fearful alien species.
