A plexaurid sea fan at 304 meters depth on Supply Reef. The polyps, each with their ring of eight tentacles, are yellow in color, in contrast to the white scale- or plate-like sclerites covering the tissue of the branches.

A plexaurid sea fan at 304 meters depth on Supply Reef. The polyps, each with their ring of eight tentacles, are yellow in color, in contrast to the white scale- or plate-like sclerites covering the tissue of the branches. Image courtesy of the NOAA Office of Ocean Exploration and Research.

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