I was looking at my tank tonight as the lights dimmed and I saw a flourescent bit on a rock above my little euphillia garden. It was way brighter than anything in the immediate area, so I was uncertain. After the lights went down I noticed 3 other bits laying on the substrate. I have a couple of tangs that chase one another through that area, so it is possible that it was flesh that was knocked off as they blasted by, but I never saw evidence of a head retracted. It could be that I missed it. Snapped the attached pic with my phone through some blue blocking glasses. They are the bits at 5 o'clock just between frogspawn and hammer, right in front of the glass at 6 o'clock, and on the sand at 9 o'clock. And yes, they are in the middle of a little frag graveyard.