I've heard that because they anemone (pom pom crab?) is a type of decorator that he will hurt corals etc by trying to decorate with them. Is this true in your experience?
How much do porcelain crabs usually cost? I really would like to get a crab since I'm pretty much fully stocked on fish but I don't want to shell out a ton of money if my lovely little valentini puffer is going to try and munch on it!