Ok, this has got to be kicker. Here I have a nice 12g nano setup for my G. Glaborous together with a yellow-tailed damsel. I just got this mantis about 1.5 weeks ago. Came with the tank and the rock. I've been hearing clicking sounds coming from the tank that I didn't think were coming from my mantis. Her clicks sound like loud "twacks". She is a good size 4". I've been watching her to see if the is making the "pinging" sounds but I couldn't say for sure. Today she was out and about and I could clearly see that she wasn't moving at all but I was still hearing the clicking sounds. Needless to say, they are driving us both crazy. She keeps running around and then holding really still trying to figure out where that clicking sound is coming from. What are the chances tha I've got a hitchiker mantis in a mantis tank? I ahve no idea where the rock came from or how long it's been in the tank. How can I figure out what is making that clicking sound?