Alveopora skin inflated?

[Stelioshah]

I just noticed that the skin on the non visible side of my alveopora is totally inflated. The coral is fully extended but the skin looks like a bubble coral! After agitating the coral, it retracted along with its skin. Is that normal?

 

[Stelioshah]

 

[Mr. Mojo Rising]

maybe if you take a pic in white light, it will help show what you see, but in that pic, it looks normal to me.

 

[Stelioshah]

maybe if you take a pic in white light, it will help show what you see, but in that pic, it looks normal to me.

The skin is see-through, it is not totally attatched on the rock, just like an inflated chalice coral, resulting in the look of a bubble coral. Check out this video towards the end, if you look closely you can see the skin curving: