Meet the "gangster crab."

The Bloods and the Crips had better watch out because a new breed of gang member has arrived -- the crab.

Yes, in this video a crab is armed with a knife and looks totally prepared to use the weapon. The creature keeps walking back on its heels (does a crab have heels?) as a man approaches it. It reminds us of a bad guy in the movies backing up until it reaches its getaway car and can then scamper to freedom.

Now we know why crabs are working out so hard. They need to be in tip-top shape when they're terrorizing us unsuspecting humans. We're not sure what to expect next, but now that we've gotten a glimpse of what they're capable of, we totally wouldn't be surprised to hear about a gang of crabs knocking over a convenience store just for the shell of it.