That one is a "sponge decorator crab" if I recall. I had the one skippy had, and it was a lot of fun until my coral tastes increa$ed enough to need him to leave them alone. He looked great with a mix of bright blue sponge and bright pink carnation coral, but eventually he had to move on. I don't think the one you have has near the penchant to try on and wear so many of the corals in the tank , and even at that, mine never picked on any LPS of SPS, or even any big 'shrooms. Mostly liked zoos (50 - 100 at a time and they never opened on him) and softies. Reef safe, except for that. Never picked on a fish even once. And I would watch him in the dark, even near small sleeping gobies, etc.