I just added one to my reef setup about 2 days ago and have only seen him once, at night. These guys are all that obnoxious when they are alone are they? I hope one of my fish haven't eaten him. I have been trying to get rid on my apstacia and finally gave in and bought the shrimp this past weekend and he has dissapeared. There at the store they seem to be very high strung what has happened. My waters good.