So I just got a piece of a zoa colony dragged at my LFS. Brought it home, started to drip it and the first one, which to me looked like a bristle worm after research, the second looks like a zoanthid eating spider or whatever it's called. I since removed those two. Although I after coming home after having to do some emergency errands, I went to hydrogen peroxide dip, since that's all I could find around, and noticed the third guy which looks to me like a serpent starfish. Any help? I haven't dipped a coral before so I don't have the proper fluids to do so at the moment.