ID please . coral .?

[mgirdwood]

Hi.
Can anyone hazard a guess at the attached. At the moment about 2 cm across was perhaps 5mm 4 months ago.
Whatever it is its hard when the polyps (?) aren't extended

Any ideas welcome. Keep it or ? As it's on the edge of my worm tube

Mark

 

[thegrun]

It looks like a Stylophora, but I haven't seen one without more color than yours.

 

[Spslvr]

Its a pocillopora