http://home.austin.rr.com/salahiands...%20whoami3.jpg

http://home.austin.rr.com/salahiands...%20whoami4.jpg

Sorry for the bad pics but it was the best I could get for now. I am curious
what the little creature just right of center is. I have noticed 4 of them
in my tank recently and have no clue if they are harmful or not. It has
white banding on its arms and is sorta similar to a anemone but also looks
like some sorta soft star fish. It seems to be pretty stationary and does
not move around. What is this thing ? Is it harmful to fish or anything else
that may be in my tank? If it is how do I get rid of it?

I did some searches and looked at some pics of different hitchhiker type
brittle stars and parasites and found nothing that looked like this. Any
help would be greatly appreciated.
thanks
G.