The Polyps and other organisms, whose remains accumulate to form a coral-reef, simply live and perform their natural functions, and then die, leaving behind them, in the natural course of events, the hard calcareous portions of their structures to add to the growing reef.
"Coral-Reefs"
Darwin, Charles
It was not till the beginning of the present century that travellers like Beechey, Chamisso, Quoy and Gaimard, Moresby, Nelson, and others, began to collect accurate details concerning the forms and structure of coral-masses, and to make such observations on the habits of reef-forming Polyps, as might serve as a basis for safe reasoning concerning the origin of coral-reefs and islands.
"Coral-Reefs"
Darwin, Charles
There is always a crowd of other Polyps dropping in on him, urging him to make a fourth in a string of coral beads or just to come out and stick around on a rock for the sake of good-fellowship.
"Love Conquers All"
Robert C. Benchley