[wickjr]

I watched the remaining polyps last night as much as I could. I didn't see anything. Another one is gone this morning though. From the description of the Sundial Snail, it seems the polyps would not disappear completely but die off after being eaten from the inside through a hole in the base. That's not what has happened. They have literally vanished all at once. No trace. Whatever is eating them, they are doing a thorough job of it. I noticed once a few months ago one of the larger hermit crabs I had hanging out in the area of the zoanthids, but I immediately removed it, and have since not noticed the hermits paying any attention to the zoanthids at all. I fear it is too late for the colonies I had, but really like zoas and want to figure out what's up before I add any more.