Diploria

Diploria is a monotypic genus of massive reef building stony corals in the family Mussidae. It is represented by a single species, Diploria labyrinthiformis, commonly known as grooved brain coral, and is found in the western Atlantic Ocean and Caribbean Sea. It has a familiar, maze-like appearance.

==Description== thumbnail|left|Grooved brain coral, Caribbean Sea, [[Vieques, Puerto Rico]] This species of reef-building coral has a hemispherical, brain-like shape with a brown, yellow, or grey colour. It has characteristic deep, interconnected double-valleys. These polyp-bearing valleys are each separated by grooved ambulacral ridges. There may be a difference in colour between the valleys and the grooves.