hitchiker shrimp

[di0nysus]

im almost positive i have a hitchiker shrimp. im not too sure what kind it is all it does is stay in one hole in a piece of LR. its a little on the black/greyish color but i cant seem to see the whole body since it stays inside the whole all the time.
does anyone have a website i can check out that related...
also do mantis shrimps make loud noises like a pistol shrimp....?

 

[YahooFishKeeper]

i hear that mantis shrimp make a striking noise like they are hitting something and pistold make more of a pop. im not positive though.

 

[TRe]

if its a mantis you will notice your crabs missing if u have any.... pistols are way more common tho

 

[di0nysus]

so there are types of hitchiking pistol shrimps unlike those sold at the lfs?
i dont know if it has to do with this hitchiker but my light makes the really loud noise like someone is flicking at the splash guard cover with there index finder as hard as they can...
and its not like this happens everyday its just pretty random.