Holacanthus africanus

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Holacanthus africanus
Holacanthus africanus.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Perciformes
Family: Pomacanthidae
Genus: Holacanthus
Species:
H. africanus
Binomial name
Holacanthus africanus
Cadenat, 1951

Holacanthus africanus, the Guinean angelfish or West African angelfish, is species of marine ray-finned fish, a marine angelfish belonging to the family Pomacanthidae. It is found in the warmer sections of the eastern Atlantic Ocean off the coast of West Africa. [2]

Contents

Description

Holocanthus africanus is differently coloured in juveniles and adults. The juvenile Guinean angelfish has a dark blue body with thin light blue vertical bars on either side of the eye. They also have a yellow caudal fin and yellow lips with a broad vertical white band in the middle of their flanks. As is they mature, the blue changes to olive green, with the white vertical bar on the flanks widening and becoming more yellowish. They also gain an almost black colour on the caudal peduncle. They may retain yellow areas along the margins of the dorsal and anal fins, and there is a dark ocellus visible behind the operculum. [3] This species attains a maximum total length of 45 centimetres (18 in). [2]

Distribution

Holacanthus africanus is found from Senegal to the Congo River estuary, including the Cape Verde and São Tomé islands. [2] It has been reported for the first time in the Mediterranean Sea in Valletta harbour, Malta in 2017. [4]

Habitat and biology

Holacanthus africanus is found in clear water over rocky reefs at depths between 1 and 40 metres (3 and 131 ft). The Guinean angelfish has a non-specialized diet. [1] It feeds primarily on sponges, but also on tunicates, jellyfish, and soft corals as well as algae and plankton. [3] Around the Cape Verde islands, this species is often found in quite dense mixed species shoals, the Guinean angelfish being dominant. [5]

Systematics

Holacanthus africanus was first formally described in 1951 by the French ichthyologist Jean Cadenat (1908–1992) with the type locality given as Gorée in Senegal. [6]

Utilisation

Holacanthus africanus does appear in the aquarium trade, albeit only a few times annually and it commands high prices. [1] Availability increased in the late 2010s. [7]

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References

  1. 1 2 3 Pyle, R.; Myers, R.F.; Rocha, L.A.; Craig, M.T. (2010). "Holacanthus africanus". IUCN Red List of Threatened Species . 2010: e.T165825A6142167. doi: 10.2305/IUCN.UK.2010-4.RLTS.T165825A6142167.en . Retrieved 19 November 2021.
  2. 1 2 3 Froese, Rainer; Pauly, Daniel (eds.) (2019). "Holacanthus africanus" in FishBase . December 2019 version.
  3. 1 2 "Holacanthus africanus". Saltcorner!. Bob Goemans. 2012. Retrieved 21 February 2021.
  4. Atlas of Exotic Fishes in the Mediterranean Sea (Holacanthus africanus). 2nd Edition. 2021. 366p. CIESM Publishers, Paris, Monaco.https://ciesm.org/atlas/fishes_2nd_edition/Holacanthus_africanus.pdf
  5. Alan Deidun; Luca Castriota; Manuela Falautano & Teresa Maggio (2017). "Yet another angelfish species for the Mediterranean – the first record of Holacanthus africanus Cadenat, 1951 from Maltese waters, central Mediterranean" (PDF). BioInvasions Records. 6 (4): 373–376. doi: 10.3391/bir.2017.6.4.12 .
  6. Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Species in the genus Holacanthus". Catalog of Fishes . California Academy of Sciences . Retrieved 21 February 2021.
  7. "Species Spotlight: The Rare African Angel". Reef To Rainforest Media. 30 March 2017. Retrieved 21 February 2021.