Can anyone ID this coral?

[madadium]

Picked it up as a $10 frag, looks kinda like a zoanthid but it's green in the middle and has high walls unlike others. Doesnt seem to fully open up at all like a zoa. Thanks!

 

[Lovemyreef2015]

It's a palythoa

 

[madadium]

It's a palythoa

Thanks, I'm wondering if it'll stretch out a bit more if I put it in some shade?

 

[Flippers4pups]

Thanks, I'm wondering if it'll stretch out a bit more if I put it in some shade?

It will open up.