Hard to tell. Can you get a daylight pic? Could be a montipora digi (haven't seen it in those colors) or a stylo/pocci. Depends how they fraged it given its current shape.
That is what I thought too- a porites but the color and the branching attribute of this coral leads me to think of maybe a psammocora? ... still the color seem different. I will be posting pics as it grows. Thank you though!