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The blue coral is the only extant octocoral with a massive skeleton, [3] which is composed of fibrocrystalline aragonite (calcium carbonate). It is a hermatypic zooxanthellaete species with either blue or green-grey polyps located within its skeleton, with each containing eight tentacles. Its colonies are either columnar, plate like or branched.
Octocorallia (also known as Alcyonaria) is a class of Anthozoa comprising over 3,000 species [1] of marine organisms formed of colonial polyps with 8-fold symmetry. It includes the blue coral, soft corals, sea pens, and gorgonians (sea fans and sea whips) within three orders: Alcyonacea, Helioporacea, and Pennatulacea. [2]
Coral calcium is a salt of calcium derived from fossilized coral reefs (primarily from limestone and coastal deposits). It has been promoted as an alternative, but unsubstantiated, treatment or cure for a number of health conditions.
Bamboo coral, family Keratoisididae (formerly Isididae [1] [2]) is a family of coral of the phylum Cnidaria. [ 3 ] [ 4 ] It is a commonly recognized inhabitant of the deep sea, due to the clearly articulated skeletons of the species. [ 5 ]
Precious coral, or red coral, is the common name given to a genus of marine corals, Corallium. The distinguishing characteristic of precious corals is their durable and intensely colored red or pink-orange skeleton , which is used for making jewelry .
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P. branneri is an encrusting coral that forms patches up to 15 cm (6 in) in diameter with knobbly projections some 2.5 cm (1 in) across. The corallites are small and pentagonal, giving the surface of the coral a pitted appearance when the polyps are retracted. When the polyps are extended to feed, the surface appears fuzzy.