Montipora capricornus. I really like the unique cup shape. There is pink/white colours throughout but it is mostly green or orange. It has a cup-like shape with wavy edges. There is no pattern. The texture would be quite rough.
Worth a visit to view these old color pages from the Biodiversity Hertage Library n9_w1150 Field book of common gilled mushrooms New York :G.P. Putnam's Sons,1928. biodiversitylibrary.org/page/24373022