Any idea what this is?

[Mrslowpwr]

This appears to be growing on my coral (unsure on the exact name). I have searched online and unable to find an answer as to what is growing. As you can see from the pictures it does not look like it's doing well.

 

[EeyoreIsMySpiritAnimal]

I'm not sure what you're asking about in the first pic, but I see a (zoa?) frag covered in GHA in the second...

 

[Rick's Reviews]

I agree, I see dead snail shells so lack of algae, unsure what your asking

 

[Mrslowpwr]

Sorry, my initial question was about what is growing on the coral. GHA is what I thought but wasn't able to confirm. The shells were just extras I had purchased and placed in tank.

 

[EeyoreIsMySpiritAnimal]

Sorry, my initial question was about what is growing on the coral. GHA is what I thought but wasn't able to confirm. The shells were just extras I had purchased and placed in tank.

Btw, none of the corals I see are SPS.