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Family

Plexauridae

Common Name(s)

Swollen knob candelabrum

Colony Form

Bushy or candelabrum, with long branches usually dividing near colony base; to 7-30 cm tall.

Axis

Cylindrical in cross-section.

Branches

Dense, upright, thick branches, 5-10 mm across, to 30 cm long.

Apertures

Crowded, conic to tube-shaped with slightly upturned lower lip, ~2 mm long but not longer than branch diameter, slightly compressed in cross section. Projecting calices around branches produce a knobby appearance. Bushy colonies have medium and large calices.

Mucus

Absent

Color

Beige, dark yellow to ochre, and occasionally purple. Dries brownish to tan. Light brown polyps.

Sclerites

Tentacular armature with rods to 0.17 mm long. Axial layer: sharp deeply purple spindles (0.16?0.4 mm long, 0.04?0.08 mm wide). Middle layer: ornamented spindles to 2 mm long, 0.38 mm wide (5-8 times longer than wide). Surface layer: dense torch-like clubs to 0.22 mm long.

Habitat

Exposed or semi-exposed reefs to 20 m depth.

Distribution

Bahamas, South Florida, and throughout the Caribbean Sea.

Notes

Highly variable colony form.

Similar Species

Eunicea fusca; Eunicea flexuosa

Date Taken

4-11-2016

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