Well my star polyps won't open and haven't opened for almost a week now. What could it be? I checked and nothing seems to bother them like fish or crabs. I dusted it off with a turkey baster and its high up to get light and good flow. What else can it be? My zoas have grown 2 heads already so what can this be?
Bristleworms will only eat dead or dying things. If your star polyps haven't been opened for a while, they are probably in bad shape and the bristleworm is doing what the clean up crew does -- cleaning up.