ec2-3-17-23-130.us-east-2.compute.amazonaws.com | ToothyWiki | RecentChanges | Login | Webcomic They are, indeed, terribly green. And they want to eat you.
And sometimes, when you shoot them, they mutate. Or clone. Or explode.
They'll do something different if you squirt them with the fire extinguisher. No real way of guessing quite what, though.