Hi all, I have a new hermit crab and I found him reaching into a hole in my live rock and pulling the arms off my brittle star...not sure if the brittle star will survive. Do they grow their arms back? Also, I would like to get a cleaner shrimp but I am worried about his survival. I have a freckled hawkfish, a tang, clownfish, and an eyelash blenny. Anybody have experiance with these guys and a cleaner shrimp? Is the hermit crab to aggresive for the shrimp?