The character is the one in the middle, the green one. I was unaware that shrooms can move. Thanks everyone for replying. I also just started looking up info on aptasia. There a quite a few in the tank. I'm not sure about the shrimp because I have a fairly troublesome Clown Trigger in the tank. I'll look at the other options first I suppose. Is there a link on the sight about making kalk paste, or is a regular google search just as affective. Is there anything in general I need to watch out for while treating the aptasia? Thank you again for all the help. I have a few more things I'd like to ID, but I'll take it one step at a time. I have to say that I'm really liking saltwater so far!!!