If it is receding there is nothing I know of other than watch and wait....... Good Luck!!
OK here is mine to see too..Another shot of him is posted under Elegance Coral on the sites listing of corals......
I sold him for a nifty a profit long time ago before he when down hill any or killed everything in reach which he was very good at doing..He was getting close to two foot across.........
You ask about feedings of individual months earlier in the thread.. Although not necessary it does not hurt. I always liked to watch him feed.....As to tentacle extension long extension is good... Puffy body with short extending is not so good.... Be sure to read all of Eric's stuff about them you can find... He is the expert.
But I still think long term health is an issue... I hear these days the Aussie specimens fare much better........
Do read and heed Eric"s research study to see signs to watch out for........Warren