I have a acro frag that I purchased from my LFS. It's light green with small polyps. Any hoo, it has a small crab that stays in the acro, I have removes it and it returns to the same acro. Is it safe? It is cream green color the same as the acro, it has short small hairs growing out of the legs. It has a body shape similar to an emerald, but ???? Will try to get a pic for ID.