this may be an incredibly stupid question.. but .... i bought a giant hawaiian featherduster about 2 or 3 weeks ago.. it has been happy .. or so i thought, even started building a new tube into the live rock i placed it on.... then suddenly it dropped its feathery part... i can see the worm inside the tube still .. its been about a week and a half since it dropped the feathery part.... but it is still moving in the tube.... do they do this randomly.. or is it just going to die slowly? do i need to remove the worm before it dies?