I have a purple reef lobster I'm going to be selling soon he hasn't touched my blenny, mandarins, corals rockwork and all. I bought him and he only had one claw he moulted and now has two claws didn't know they could do that.
My two snapping shrimp (one Japanese Red Pistol and one Candystripe Pistol), look more like miniature lobsters than they look like shrimp! Kinda shy, but still cool, diggin' caves everywhere.