sea fan

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corals having a treelike or fan-shaped horny skeleton
Any of various yellowish to reddish fan-shaped corals of the genus Gorgonia, especially G. flabellum, of coastal waters of Florida and the West Indies. Any of about 500 coral species (genus Gorgonia) especially abundant in shallow waters along the Atlantic coasts of Florida, Bermuda, and the West Indies. Polyps grow colonially in a flat, fanlike pattern. Each polyp has some multiple of six tentacles, which it spreads out to form a plankton-catching net. An internal skeleton supports all branches of the colony. The living tissues (often red, yellow, or orange) entirely cover the skeleton. The fan-shaped colonies usually grow across the current, increasing their ability to ensnare prey. All species grow to about 2 ft (60 cm) high
Any gorgonian which branches in a fanlike form, especially Gorgonia flabellum of Florida and the West Indies
sea fan
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