So......the infection/predation continues..........another colony affected about 4 days ago, so I removed all of my hermit crabs and emerald crabs to eliminate them as culprits, and yesterday the colony looked much better, and I thought, is it really better, or is my mind playing tricks on me. Today the colony also looked good, and then I got to looking at another colony on the side of the tank, and I saw something that looked like a zoa skirt, but it blew off with a turkey baster. I sucked it up, and lo and behold....another nudi, very small, maybe only 3-4 mm, and a completely different color than the first guy I found. So, what eats nudis? I have a small yellow coris wrasse in there right now, not sure if he will do the trick or not, he does not seem like he surfs the rocks very much for food, kinda just waits for feeding time!
P.S. this guy is still alive in a glass jar in the tank with a mesh covering, Ed Hahn, I think you wanted one? I will try to keep him alive for you if you want him.