Coral Rune
Resident Since: 2007-05-04 (18 years, 4 months ago)
A hard calcareous substance consisting of the continuous skeleton secreted by many tribes of marine cœlenterate polyps for their support and habitation. Found, according to the habits of the species, in single specimens growing plant-like on the sea-bottom, or in extensive accumulations, sometimes many miles in extent, called coral reefs.

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