This lovely SPS is a Surabaya Acropora sp. It is aqua-cultured in Surabaya, I was told. It has some lovely color to it and the shape appeals to me, and did well in my tank. The polyps are green, within a creamy-pinkish colored colony. Aqua-cultured means it was grown from brood-stock, rather than taking corals from the ocean's reefs. Often the cost of aqua-cultured is more, but they are more forgiving than wild-caught corals when it comes to settling into our aquariums.