Alex Mustard / Close focus wide angle view of a colony of Great star coral (Montastrea cavernosa). This photo is not digital manipulated, but taken with a fisheye lens placed very close to the coral with flashes aim...

Christian Ziegler / Great Star Coral (Montastraea cavernosa) growing directly beneath Red Mangroves (Rhizophora mangle), Bastimentos Marine National Park, Bocas del Toro, Panama

Christian Ziegler / Great Star Coral (Montastraea cavernosa) growing directly beneath Red Mangroves (Rhizophora mangle), Bastimentos Marine National Park, Bocas del Toro, Panama

Christian Ziegler / Brain Coral (Diploria labyrinthiformis), Bastimentos Marine National Park, Bocas del Toro, Panama

Pete Oxford / Christmas Tree Worm (Spirobranchus giganteus) filter feeding while attached to Brain Coral (Diploria labyrinthiformis), Bonaire, Netherlands Antilles, Caribbean

Pete Oxford / Christmas Tree Worm (Spirobranchus giganteus) filter feeding while attached to Brain Coral (Diploria labyrinthiformis), Bonaire, Netherlands Antilles, Caribbean

Pete Oxford / Christmas Tree Worm (Spirobranchus giganteus) filter feeding while attached to Great Star Coral (Montastraea cavernosa), Bonaire, Netherlands Antilles, Caribbean

Pete Oxford / Christmas Tree Worm (Spirobranchus giganteus) filter feeding while attached to Great Star Coral (Montastraea cavernosa), Bonaire, Netherlands Antilles, Caribbean

Pete Oxford / Brain Coral (Diploria labyrinthiformis), Bonaire, Netherlands Antilles, Caribbean

Juergen Freund / Vast fields of Vase / tiered corals (Echinopora sp) with diver, Sulawesi, Indonesia.

Pete Oxford / Brain Coral (Diploria labyrinthiformis) on reef, Jardines de la Reina National Park, Cuba

Pete Oxford / Symmetrical Brain Coral (Diploria strigosa) on reef, Jardines de la Reina National Park, Cuba

Georgette Douwma / Stony Coral (Favia sp.), Faviidae. Rinca, Komodo National Park, Indonesia, October.

Georgette Douwma / Stony Coral (Favia rotundata), Faviidae. Rinca, Komodo National Park, Indonesia, October.

Georgette Douwma / Stony Coral (Favia rotundata), Faviidae. Rinca, Komodo National Park, Indonesia, October.

Georgette Douwma / Stony Coral (Favia rotundata), Faviidae. Rinca, Komodo National Park, Indonesia, October.

Georgette Douwma / Stony Coral (Diploastrea heliopora), Faviidae. Rinca, Komodo National Park, Indonesia, October.

Georgette Douwma / Stony Coral (Favia rotundata), Faviidae. Rinca, Komodo National Park, Indonesia, October.

Pete Oxford / Brain Coral (Diploria labyrinthiformis), Belize Barrier Reef, Belize

Pete Oxford / Brain Coral (Diploria labyrinthiformis), Belize Barrier Reef, Belize

Pete Oxford / Boulder Brain Coral (Colpophyllia natans), Belize Barrier Reef, Belize

Sue Daly / Polyps of the Hard coral (Diploastrea helipora) Lembeh Straits, Sulawesi, Indonesia

Norbert Wu / Boulder Brain Coral (Colpophyllia natans) common in south Florida, Bahamas and Caribbean, Saba, Dutch Antilles

Norbert Wu / Brain Coral (Diploria sp) colony partially taken over by sponge, which may eventually cover the entire coral, Indonesia

Norbert Wu / Brain Coral (Diploria sp) symbiotic algae within polyps produce food, Roatan, Honduras

Norbert Wu / Brain Coral (Diploria sp) dying, white area has been bleached and covered by sediment Healthy coral colony is greenish-brown and clearly shows grooves

Norbert Wu / Brain Coral (Diploria sp) dying, white area has been bleached and covered by sediment Healthy coral colony is greenish-brown and clearly shows grooves

Roberto Rinaldi / Christmas tree worms (Spirobranchus giganteus)sprouting from brain coral (Faviidae) on a reef, Belize. ^^^The worms open their corkscrew-like plumage to filter plankton and other microscopic nourishme...

Roberto Rinaldi / Macro image of a hard coral / stony coral (Faviidae sp), La Réunion, Indian Ocean

Roberto Rinaldi / Macro image of a hard coral / stony coral (Faviidae sp), La Réunion, Indian Ocean

Christian Ziegler / Brain Coral (Diploria labyrinthiformis) and seaweed, Bastimentos Marine National Park, Bocas del Toro, Panama

Christian Ziegler / Coral (Faviidae) with sea urchins and feather duster worms, Bastimentos Marine National Park, Bocas del Toro, Panama

Pete Oxford / Christmas Tree Worm (Spirobranchus giganteus) filter feeding while attached to Great Star Coral (Montastraea cavernosa), Bonaire, Netherlands Antilles, Caribbean

Pete Oxford / Feather Duster Worm (Sabellidae) filter feeding within Brain Coral (Diploria labyrinthiformis), Bonaire, Netherlands Antilles, Caribbean

Roberto Rinaldi / A diver swimming over a massive brain coral (Faviidae), Great Barrier Reef, Australia Model released.

Roberto Rinaldi / A Caribbean coral garden with two Brain coral (Faviidae) heads in the foreground, Belize

Roberto Rinaldi / Brain coral (Faviidae) on a reef, Belize

Scott Leslie / Brain Coral pattern, Bonaire, Caribbean