Possibly a Stylocoeniella, maybe a Space Jam or Looney Tunes. Possibly a lepto, though the spots look more like individual polyps (stylo) rather than small pools (lepto).
If it is a stylo - it's an encrusting SPS that does well with decently high PAR (200-350) and strong flow, though it might need lower flow than usual to recover from its current state.
On second inspection, it seems that the rock does not seem to be the coral skeleton (coralline growing in between the polyps). My guess is some sort of octocoral