what is this worm? Parasite?

[justinl]

Originally Posted by marie

I believe they're called mesenterial filaments

I don't think so. The only time anemones extrude these are when they're fighting another coral that is intruding on their territory or something.

If you've ever fragged mushrooms, you'll see that these are just shroom guts. The fact that the shroom is extruding them makes me think that the underside of the shroom was abraded. Have you recently pressed on the shroom? maybe when you moved it?