Venus sea fan (Gorgonia flabellum)

Classification (WoRMS)

Full classification as recorded by WoRMS: Kingdom: Animalia · Phylum: Cnidaria · Class: Octocorallia · Order: Malacalcyonacea · Family: Gorgoniidae · Genus: Gorgonia.

Accepted name: Gorgonia flabellum · Authority: Linnaeus, 1758 · Taxonomic status: accepted · AphiaID: 290029.

Synonyms and superseded combinations recorded for this taxon: Busella occatoria (Milne Edwards & Haime, 1857); Gorgonia flabellum f. occatoria (Milne Edwards & Haime, 1857); Rhipidigorgia flabellum (Linnaeus, 1758); Rhipidigorgia occatoria Milne Edwards & Haime, 1857; Rhipidogorgia elegans Duchassaing & Michelotti, 1864; Rhipidogorgia flabellum (Linnaeus, 1758).

Source: World Register of Marine Species (WoRMS) — https://www.marinespecies.org/aphia.php?p=taxdetails&id=290029 (CC BY 4.0). Accessed 2026-09-23.

Biology and life history (SeaLifeBase)

Measured values published by SeaLifeBase for Gorgonia flabellum. Only fields the database actually holds for this species are shown; these are database values, not aquarium guidance.

Depth range: 0–16 m · Habitat zone: sessile.

SeaLifeBase notes: Intertidal (Ref. 109199).

Source: SeaLifeBase species summary (SpecCode 44142) — https://www.sealifebase.se/summary/Gorgonia-flabellum.html (CC BY-NC 3.0 — non-commercial use only). Accessed 2026-09-23.

Distribution and occurrence records (GBIF)

185 georeferenced occurrence records for Gorgonia flabellum are published through GBIF from 19 countries or marine areas. The map above plots 46 distinct locations from a sample of 185 records, omitting 7 inland records that carry an institution's coordinates rather than a collection site; it shows where the species has been observed and reported, not a modelled range.

Most records by country or area: Mexico (56); Bermuda (30); Martinique (20); Bahamas (17); Colombia (13); Guadeloupe (9); Puerto Rico (7); United States of America (7); Virgin Islands (U.S.) (6); Saint Barthélemy (3); Bonaire, Sint Eustatius and Saba (3); Panama (3); Belize (2); Haiti (2); Italy (2).

Marine regions with a valid WoRMS distribution record: Gulf of Mexico; Panamanian Exclusive Economic Zone.

Source: GBIF Occurrence Search (taxonKey 5185387) — https://www.gbif.org/occurrence/search?taxon_key=5185387&has_coordinate=true (records CC0 / CC BY); WoRMS distribution records (MarineRegions) — https://www.marinespecies.org/aphia.php?p=taxdetails&id=290029 (CC BY 4.0); Natural Earth 110m basemap — https://www.naturalearthdata.com/ (public domain). Accessed 2026-09-23.

Description and natural history (Wikipedia)

The Venus sea fan is a delicate-looking colonial soft coral in the form of a fan composed of a lattice of branches in a single plane. The coral grows from a small base, forming several main branches with side branches and a network of small branchlets. The Venus sea fan is similar in appearance to Gorgonia ventalina, but has a slightly more untidy shape and short, stubby side growths coming out of the main plane. In G. flabellum, the branches are flattened at right angles to the plane of the fan, while in G. ventalina, the branches are either round or flattened parallel to the plane of the fan. The wide-mesh sea fan (Gorgonia mariae) is also similar in appearance, but at only 30 cm, is smaller, and many of the branchlets do not interconnect. The Venus sea fan is white, yellowish, or pale lavender. The fan is often found oriented perpendicular to the incoming waves and can grow to a height of 1.5 m.

The Venus sea fan is very common in the Bahamas, and in this location is easily distinguishable from G. ventalina. In other parts of its range, Florida and the Lesser Antilles, however, the two species are more easily confused. It is a shallow-water species seldom exceeding a depth of 10 m and favours locations with strong wave action.

The skeleton of the Venus sea fan is composed of calcite and a collagen-like substance. Embedded in this are the coral polyps, each of which is a filter feeder and extends its eight tentacles to catch plankton drifting past with the current. The tissues contain symbiotic dinoflagellate algae Symbiodinium spp. which are photosynthetic and use sunlight to create organic carbon compounds which are then available to the host coral.

The Venus sea fan is threatened by a variety of pathogens, including cyanobacteria and the fungal pathogen Aspergillus. Cyanobacterial overgrowth, particularly by filamentous Oscillatoriales, causes tissue necrosis and disrupts the sea fan's structure. Additionally, Aspergillus infections have been linked to large-scale tissue loss, especially in larger colonies and deeper waters.

Source: Wikipedia: Gorgonia flabellum — https://en.wikipedia.org/wiki/Gorgonia_flabellum (CC BY-SA 4.0). Accessed 2026-09-23.