symphyllia? I.D. Help?

[poojan]

I bought what I believe is a symphyllia from world wide a few days ago. Seems to doing fine but I’m keeping a close eye as I know these guys have a spotty success rate ive also been digging and I’m no longer 100% sure this is in fact a symphyllia is there anyone who could ID this for me ? I moved it a bit today to keep it away from a chalice I have growing out so it not as “puffy” as usual

 

[poojan]

Also I see a small area of green spearing in the center of one section I’m aware these change color when healthy but I didint expect it to happen on this individual at all much less so quickly should I be concerned is this an indicator of a health issue?