One of the many odd crustaceans that lives in the near abyss deep in the ocean. It oddness is based upon the fact that it has a gun (well the equivalent of a gun). Most creatures do not have a gun of any sort (of course).
The really disturbing part about this creature is its ability to shoot a small pocket of gas at a high rate of speed which reaches plasma temperatures around the temperature of the sun. This is only possible due to the extreme pressure of the ocean upon it. (i.e Pressure = lots of heat).
In my personal opinion. I wouldn't mess with one of these... so remember next time you're 30k feet under the ocean, don't pick a fight with one of these crabs.
Have been unable to find much information on it, except what I have seen on the discovery channel. If anyone finds any extra information on these please /msg me.