Kingdom Animalia (animals) Eumetazoa (metazoans) Phylum Cnidaria (corals, sea anemones, jellyfish, and relatives) Class Anthozoa Order Scleractinia Family Merulinidae Genus Hydnophora Species Hydnophora bonsai (Spine coral) Species Hydnophora exesa (Spine coral) Species Hydnophora grandis (Spine coral) Species Hydnophora microconos (Spine coral) Species Hydnophora pilosa (Spine coral) Species Hydnophora rigida (Spine coral)
