Yeah, I tried to google it as well. Came across a Nudi search page that had 21 pages of Genus' of Nudis. Some Genus had 9 sub-whatevers that all looked completely different. I gave up. I looked for corals that it looked like as they often look like what they eat (camo) and Gorgonians seemed the most likely. But that didn't help finding an exact match but Facelina annulicornis semed close in some photos (but not in others).
Has he had any corals mysteriously dying?