I have a hitch hikers that I finally ID'ed it is a Mithrax Forceps (Majid Crab) are they reef safe? If not how do you remove them he is very snicky but getting bigger by the day. Pics at rock non stop. I have seen him pinch at my cleaner shrimps whiskers once. Does anyone have any experience with this crab? how big do they get? habits? etc.