Pillar Coral

Fascinating facts about the Pillar Coral

• Pillar coral is the sole member of its genus, Dendrogyra, making it a unique lineage among hard corals. This monotypic status means no other species shares the genus name, underscoring its distinct evolutionary history. It belongs to the order Scleractinia and is found in the western Atlantic and Caribbean Sea, where it occupies the same habitats as many other hard corals but remains taxonomically isolated.
• A mature pillar coral can tower up to 3 m with individual columns exceeding 10 cm across, although most colonies are considerably smaller. The coral forms an encrusted base from which vertical cylindrical, round-ended pillars rise, creating a striking forest of underwater trunks. These pillars develop on both flat and sloping reef surfaces at depths down to 20 m, where they contribute to the reef's three-dimensional structure.
• Unlike most hard corals, pillar coral's polyps are often extended in daylight, letting observers watch them feed. The polyps protrude from corallites less than 1 cm in diameter and are arranged in shallow meandering valleys, giving the colony a furry appearance when the tentacles undulate together. Because the skeleton is usually hidden by these extended polyps, the coral appears as a mass of soft, moving tissue rather than a rigid structure.
• When an entire pillar coral colony is dislodged and topples, the fallen base can generate fresh vertical cylinders, allowing the organism to rebuild its structure from the ground up. Researchers have observed specimens that have undergone this process multiple times, with each toppling leaving a distinctive imprint that reveals the colony's growth history.
• In the wild the pillar coral has vanished from Florida's reefs, with the remaining individuals now largely confined to aquarium collections. Historically it was abundant on Florida's reefs, but intensive collection dramatically reduced its numbers. Several of the remaining populations occur within designated marine parks, where protection from direct human impact offers a refuge.

Sources

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• Wikipedia

At a glance

About the Pillar Coral

Pillar coral is one of the most architecturally striking corals in the Caribbean. Its thick, cylindrical columns rise vertically from the reef like stone pillars, covered with a dense carpet of extended polyps even during the day. This distinctive feeding behaviour sets it apart from virtually all other reef corals, which typically retract their tentacles in daylight and feed only at night.

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