Open brain coral
The open brain coral is a brightly colored free-living coral species in the family Merulinidae. It is the only species in the monotypic genus Trachyphyllia and can be found throughout the Indo-Pacific. Wikipedia
Scientific name: Trachyphyllia geoffroyi
Class: Hexacorallia
Genus: Trachyphyllia; Milne Edwards & Haime, 1849
Family: Merulinidae
Kingdom: Animalia
Order: Scleractinia
Phylum: Cnidaria