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Symmetrical Brain Coral Video Stock Footage

The symmetrical brain coral forms smooth flat plates or massive hemispherical domes up to 1.8 metres (5 ft 11 in) in diameter. The surface is covered with interlinking convoluted valleys in which the polyps sit in cup-shaped depressions known as corallites. Each of these has a number of radially arranged ridges known as septa which continue outside the corallite as costae and link with those of neighbouring corallites. The ridges separating the valleys are smoothly rounded and do not usually have a groove running along their apex as does the rather similar grooved brain coral (Diploria labyrinthiformis). The coral has symbiotic dinoflagellate alga called zooxanthella in its tissues and it is these which give the coral its colour of yellowish or greenish brown, or occasionally blue-grey. The valleys are often a paler or contrasting colour. The fossilised remains of Pseudodiploria strigosa have been found alongside those of other massive corals, Pseudodiploria clivosa, Siderastrea siderea and Solenastrea bouroni, in marine deposits in Río Grande de Manatí, Puerto Rico that date back to the Pleistocene.

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Animalia: Cnidaria: Scleractinia: Anthozoa: Faviidae: Diploria strigosa

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