Thanks Jenn. I am growing kind of fond of it. So far it hasn't caused any problems. It moves around on the piece of rock that it came on, but it wont leave it. Today i fed it a silverside. Guess i wont worry about it.
On its own it's fine - but if it starts to divide, be aware that they can multiply exponentially and "take over". A friend of mine just nuked about 100 of them in his 120. Details in Ray's thread about Majano anemones.