Will My Leather Survive?

[Sparkfarmer]

We noticed two nights ago that our Long tenticled Toadstool leather wasn't looking to good. Not too unusual for that time of night, but yesterday he did not come back to his usual self. His tenticles on one half of his top will not come out and he has taken on a greenish hue in that area. He's also toppled over. This afternoon I noticed an Aptasia was growing out from underneath the leather on the side and I think it had been stinging my coral. I had to cut the leather off of at base to get to the Aptasia out. Now I have on very unhappy leather on my hands and I am wondering, will it survive? Has anyone had experience with this before?