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; class Anthozoa, subclass Octocorallia)

An order of colonial octocorals that are anchored by a holdfast and have a tree-like shape supported by a branching, central skeleton of horn-like, organic material (gorgonin) or calcareous material, or both. They first appeared in the Cretaceous. The order contains two suborders, 18 families, and about 120 genera.

Subjects: Zoology and Animal Sciences.

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