ID Please? Bubble Coral?

[Bernardhny]

Two days ago I saw a speck of green in this location, as if something was pushing up from the sand. I thought it was just one of my garden eels but today this looks like my bubble coral has spawned. Anyone ever have this happen? Is that what this is? I thought bubble corals split....I don't recall seeing it happen. Thoughts? As you can see to the left of the object is my other bubble coral. The mouth looks the same as the other bubble.

 

[MikeTR]

that looks like a trachyphyllia.. but not sure how one would go missing for long enough to be completely forgotten about and return from getting buried.

 

[Bernardhny]

I only have one of those and it is happy on the other side of the tank!

 

[skinz78]

Agreed, it's a trachy.