Theres a bristol worm living in frogspawn head

[ashley]

I got a frag of branching frogspawn a few weeks ago and I noticed that one head looked dead on one half and alive on the other half. I didn't think too much of it because maybe it was damaged in the move. But the dead half still had tiny shriveled up tenticles (I guess thats what you call them?) in a small spot so maybe it would come back.
So far it hasn't, they are still there but tiny and shriveled. But then I noticed there is a very small bristol worm living in that side of the head. I've seen it come out to look for food then retreat right back into the head. Could that be why the coral appears dead on that side? I've tried removing the worm but theres no way to grab it, its pretty small and quick.
Anyone have any ideas on how to get it out of there without hurting the coral?