HydnophoraHydnophora is a genus of large polyp stony corals in the family Merulinidae.List of speciesAccording to World Register of Marine Species :Hydnophora bonsai Veron, 1990Hydnophora exesa Hydnophora grandis Gardiner, 1904Hydnophora microconos Hydnophora pilosa Veron, 1985 ''Hydnophora rigida''