Alex Mustard / Grooved brain coral (Diploria labyrinthiformis) at night with polyps extended to feed, Grand Cayman, Cayman Islands, British West Indies. Caribbean Sea.

Juergen Freund / Brain coral (Diploria labyrinthiformis). Caribbean

Linda Pitkin / Yellow goatfish (Mulloidichthys martinicus), by Grooved brain coral (Diploria labyrinthiformis) Bonaire: Captain Don's Habitat, House Reef, February

Adrian Davies / Fossilised Grooved brain coral (Diploria labyrinthiformis) Barbados.

Adrian Davies / Fossilised Grooved brain coral (Diploria labyrinthiformis). Barbados.

Adrian Davies / Fossilised Grooved brain coral (Diploria labyrinthiformis). Barbados.

Pete Oxford / Brain Coral (Diploria labyrinthiformis), Banco Chinchorro, Yucatan Peninsula, Mexico

Pascal Kobeh / Brain coral (Diploria labyrinthiformis) Guadeloupe Island, Mexico. Caribbean.

Pascal Kobeh / Brain coral (Diploria labyrinthiformis) with diver, Guadeloupe Island, Mexico. Caribbean. August 2012.

Alex Mustard / A Grooved brain coral (Diploria labyrinthiformis) spawning at night, releasing pink and white bundles of eggs and sperm from the polyps within its grooves, East End, Grand Cayman, Cayman Islands, Brit...

Alex Mustard / Grooved brain coral (Diploria labyrinthiformis) close focus wide angle view, East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Alex Mustard / Grooved brain coral (Diploria labyrinthiformis) close up view, East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.