Help me ID this LPS...

[GCode]

Bought this guy about a year ago and it got lost in my tank. Found it stuck between some rocks about 3 months ago and it was almost dead. It has rebounded well over the last 3 months and I have no idea what it is. Can you guys take a stab at what this is? Kinda looks like a button scoly but its not... Maybe some kind of echinata?

 

[thamnasteroid]

Acanthastrea pachysepta

 

[GCode]

Acanthastrea pachysepta

I do believe you are right! Thanks for the diagnosis.

Should they be on the sand bed or in the rocks? Will it stay 1 polyp or multiply? Been looking around for these answers but not much info out there about these guys.

 

[thamnasteroid]

It should multiply heads, but very slowly. Pachyseptas are slow growers. It shouldn't matter where you put it as long as it's not in the top third of your tank.