Pistol shrimp...but what kind?

[Gatorfreak]

I have a pistol shrimp that came as a hitchhiker on either Gulf or Keys rock from LiveRocks.com. I haven't been able to get a pic of him yet. I don't get a chance to see him very often.
Description:
Bright blue legs
White stripe down the middle of the back
Darker stripes on either side of the white stripe
Rest of the body is a more dull grayish color

Hopefully someone happens to know what kind it is.

 

[Gatorfreak]

I found another thread where someone had a pic of the exact same kind. Apparently it's very common. Still, if anyone knows what particular kind it is, I'd like to know.

Here's the thread: http://aquariumadvice.com/viewtopic.php?t=20731

And here's the pic: