Tongue Coral - Herpolitha limax

"Herpolitha" is a monotypic genus of mushroom corals in the family Fungiidae. The only member of the genus is "Herpolitha limax", commonly known as the tongue, slipper, mole or striate boomerang coral. It is a free-living species and is native to reefs and lagoons in the Indo-Pacific region. The International Union for Conservation of Nature has assessed this coral as being of "least concern".