It is definitely not a Acropora tortuosa. Judging by the tabling structure, the vertical branchlets, and the radial cup like corallites I would guess it is Acropora cytherea. The axial corallites shooting up everywhere kinda throws me off but that is normal if it starts to grow fast. Acropora cytherea. Corals of the World - Photos, maps and information about corals and reefs