I guess all you can do it wait and watch for now... I would not throw it out just yet. I guess you can take it out and smell it. That is what I have been doing with the coco worm.

What is the life-span of a healthy featherduster? How long do worms live?

My two Sabellastarte indica are coming up on a year old soon...would hate to lose them as they host my clowns.

I read they do not live long, about a year, but I do not have experience other then just reading about them. My coco worm is form a tank shut down and he is over two years old. I am glad he is growing his crown back now, but I don't know if he will live for the long term since it happened to him twice now. I know certain fish will pull the crowns off, but had no idea my picasso trigger would do this.

I've had 5 Christmas tree worms living in a porites colony for 3 years and I've had a Hawaiian feather duster for 4. I feed a bit of Reef Chili 2-3 times a week but mostly I credit my large dirty system for keeping them fed and alive.