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organ-pipe coral

noun
1.
an alcyonarian coral of the genus Tubipora, occurring in tropical waters, and forming a complex colony of brick-red, vertical tubules joined at intervals by transverse plates.
Origin
1825-1835
1825-35
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Encyclopedia Article for organ-pipe coral

(genus Tubipora), any of a genus of marine animals of the class Anthozoa (phylum Cnidaria). The single known species, Tubipora musica, occurs on reefs in shallow waters of the Indian and Pacific oceans and is characterized by long, parallel upright polyps, or stalks, supported by a skeleton of rigid tubes of calcium carbonate. The tentacles of the polyps are sometimes green, and the skeleton is bright red or crimson. After the soft parts die, the skeleton remains as a brightly coloured mass of tubes that resemble organ pipes (hence the common name).

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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