Not really classic, but pretty sure this is it. The second one moreso. Its sometimes hard to tell the difference in a late progression of this condition, unexpanded and unhappy, stressed, or what. The opacitiy on the tentacles of the second one is a pretty good bet, and the edges of the first, but not sure. I'd take them both as perhaps they will be the saem, and perhaps it will show up as another pathology because this looks more like the sick elegance 3 I acquired that was in worse shape than elegance 2...
Amanda: If you can send or post a photo, I could tell you a lot more - like if it is what we are looking for, but if sounds like it. In terms of the process, the ethanol will kill it fairly quickly, but let me say this...
Corals are extremely primitive animals. They have no centralized nerve structure, not even ganglia. They do not have pain receptors and nothing to receive the signal if they did. They have what is called a nerve net, a simple structure of response structures. They are very receptive to "smells" but only in a retract or expand sense.
Your mantis shrimp, in comparison, is very advanced, very aware, and very smart. It is probably sentient to some extent. Clams are very advanced by comparison. Corals are not. It will feel no pain and certainly seems even theoretically less that what it is likley going through right now.