Coral ID?

[Saltliquid]

Hey guys this coral of green polyps, started growing a few months back and i assume it is a goni?
There are many sections of it around the tank now, this is the largest and I goes under the acan as well.
The rock is sterilised base rock with bleach and hot water then in our local creek/drain for two weeks so no chance of life coming along with its introduction, no life gets in that I did not add individually.

I do have one green goni that is quite a bit larger then when it went in just 8 to10 inches away from this one.
What do you guys think it is?

Not so close.

Closer.

 

[Saltliquid]

No one has an opinion!

 

[parrthed]

Judging by the smooth color of the base and the polyps, maybe pagoda cup?

 

[alesolra]

Maybe can be Duncanopsammia Coral

 

[Saltliquid]

Thanks guys, I found it as a pagoda.
I forgot that I had one in there in May and took it out and put in the bottom tank, it must have spawned in that time.