So what should I do? My tang is nibbling at my Featherduster like she does the live rock. I couldn't figure out if the worm was moving itself or if my Blenny was doing it. My tang is the culprit, caught her three times yesterday. The dusters tube is blue and softlooking in spots now and he hasn't "comeout" all day. Matter of fact, his tube looks pinched. Should I cover the tube in some sand? Maybe the tang won't bother it then? Any other suggestions?