I have at least 3 if not more. I want them out!!! I'm pretty sure they are eating my clams and corals. Perhaps the corals were sick, but I always see them picking at them. I don't feed enough to keep them and the fish/crabs all happy so they are going! I was hoping to get $4 or $5 each otherwise I will just put them in the UNI tank, or the tank at home.