Click! Click!

[Starry]

Problem is I only got a quick glimpse of it from about 4 feet away. It definatly made the noise I have been hearing. A loud click or pop. Definatly not a snail tapping or heater coming on.
Anyhow, have moved the rock its holding out in into my makeup water tank for now. Will try the bottle trap over the weekend and if no luck, will hyper-salinate said rock. The main reason I'm concerned in that I have read Mantis are notorius for cracking glass, heaters, ect... If it turns out to be a little pistol shrimp, great. If not....