Hi all, After chatting with our friend, who manages a fish store, about the random clicking noises coming from our tank we think we may have some kind of pistol or mantis shrimp. We managed to pull the rock out that it was living in and get it out ( a 2 day affair i'll add) after we had read about how bad and annoying they can big esp once big! So, my question for you all... is it a mantis or pistol shrimp? Or something else all together? We still have a clicking noise in the tank so i guess we have a few that hitch hiked in on our rock, how important is it to get them out??? Ive heard his one big fat claw can be deadly on small fish? The noise is a couple of loud clicks rather than a constant click - prob 1 to 2 clicks each time. Ive never posted a pic before so hopefully i do it right? Appreciate any advice as we would want to get it out before the tank is more established and trickier to get to all the rocks.