Shy Shrimp

[doch]

So I recently picked up some Fire Shrimp... and have noticed them to be VERY reclusive. Is this the case with them all the time, or do they come out of their shells (excuse the choice of expression) after acclimating to the tank? I have read that they tend to be pretty shy, but they have both picked a spot in the deepest, darkest, make me climb around a bunch of stuff to get to that side of the tank to see if they're still alive (gasp!) spot that there is. They are so nice... I just hope that they'll come out eventually!