Let me start by saying…mantis shrimp are tricky little boogers! To recap, I purchased some uncured deco rock, and while curing it in a 20 gallon tank, I heard clicking/popping noises off and on. The noises stopped, so I blamed my paranoia and imagination (and my husband says I’m in denial!). Of course, now that the rock has been transplanted to my main tank, the noises have begun again and lo and behold, I have spotted the culprit. The mantis shrimp is about 1 1/2″ long and mostly hides in the rocks, but seems to be getting bolder by the day, actually coming out into view when I shine a light in his hole. My current tank inhabitants include: a maroon clown, a strawberry Pseudochromis, a Christmas wrasse, a three-striped damsel and critters include: Astrea snails, a few peppermint shrimp, a green brittle star, a pincushion urchin, a small red starfish and a pink and green cucumber. I just want reassurance that I do indeed need to remove the mantis shrimp.