Interesting... I wonder how he got in there. This is the one and only one that I have seen. He could have hitchhiked in with the macro, but it has been in there for over 4 months so you would think I would have spotted one by now. I did have a few corals in the sump for a bit, but they were dipped before going in. I guess it could have hitchhiked in on a snail shell, but again, they were added a while ago. The only recent wet addition was a bag of water from reefcleaners.org 2 weeks ago that was supposed to be copepods (although it just looked like a bag of water to me).