Any idea what is happening with my Green Scoly ?

[Axel33]

So I have no idea what happened with my scoly.
Last night had some things on top of the center area and today I was thinking that is sand and fish poop and maybe some food.
But I was kinda curious and I tried to blow the thing away and I saw that it kinda has like a whole.
I tried to suck the thing that was on top in that area and I can see a bit of the skeleton on the scoly. I have no idea what might be the issue.
Is looking puffy and happy. When I tried to suck the tings from that area and move the scoly it did not really sunk in that much.

 

[MarAquatic]

Is there a crab in it?

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[Axel33]

No is just the skeleton.

 

[Tcook]

Any emerald crabs or others in the tank.

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[Axel33]

I have 5 Haloween hermit crabs, over 20 hermit crabs, coral beauty and a tuxedo urchin that I am suspecting in a 75 gallon tank. I already moved 2 big Halloween hermit in my QT tank to see if everything else gets chopped.

I also saw 2 mushrooms that got parts of the body missing and 3 different zoas that ware having part of the polyp missing.

 

[Axel33]

no emerald crabs in