feather duster lost it's cap
I have read that if a feather duster is stressed, it will discard it's cap and grow it back later. Will it also discard it's cap regularly just to grow? Also, how do I know if it's dead or not? I tried to move it because I suspect it may be stressed due to being too close to my candy cane coral, but it just broke in half.
Is it too late? Should I watch it and see or remove it?