Cephalopholis polleni

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Cephalopholis polleni
CephPollenorangkucing.jpg
juvenile
Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Perciformes
Family: Serranidae
Subfamily: Epinephelinae
Genus: Cephalopholis
Species:
C. polleni
Binomial name
Cephalopholis polleni
(Bleeker, 1868)
Synonyms [2]
  • Epinephelus polleniBleeker, 1868
  • Aethaloperca polleni(Bleeker, 1868)
  • Gracila polleni(Bleeker, 1868)
  • Plectropoma lineatum Bliss, 1883
  • Cephalopholis virgatus Fourmanoir, 1955
  • Gracila okinawae Katayama, 1974

Cephalopholis polleni, the harlequin hind, harlequin grouper, harlequin cod, harlequin rockcod or blue-lined grouper, is a species of marine ray-finned fish, a grouper from the subfamily Epinephelinae which is in the family Serranidae which also includes the anthias and sea basses. This fish occurs around offshore islands in the Indo-Pacific region. It occasionally makes its way into the aquarium trade.

Contents

Description

Cephalopholis polleni has a body depth which is shorter than the length of its head, the standard length being 2.7 to 3.1 times the depth. It has a slightly truncated caudal fin and a finely serrated, rounded preopercle. The maxilla reached beyond the back of the eye. [3] There are 9 spines in the dorsal fin and 14-16 soft rays, while the anal fin has 3 spines and 8-9 soft rays. [2] This is a yellow to greenish-yellow grouper which is covered in bright blue stripes. [4] Juveniles up to a standard length of 4 centimetres (1.6 in) are yellowish brown, shading to lavender on the chest and belly and to yellow at base of the tail with the yellow extending as a wide band on both lobes of the caudal fin. They also have a yellow snout and a large black spot on both sides anterior to the nostrils. The larger juvenile, up to a standard length of 10 centimetres (3.9 in) become brownish orange with horizontal purple stripes on the head and body. [3] The maximum recorded total length is 43 centimetres (17 in). [2]

Distribution

Cephalopholis polleni has a scattered distribution on offshore islands in the Indian Ocean and Western Pacific Ocean from the Comoro Islands to the Line Islands and French Polynesia. It has not been recorded from the Red Sea, the eastern African coast, Sri Lanka, continental Australia and the major islands of Indonesia. [1] In Australia it has been recorded from Christmas Island and Cocos (Keeling) Island. [4]

Habitat and biology

Cephalopholis polleni occurs around oceanic islands where it can be found in clear waters in the vicinity of steep drop-offs and it is infrequently recorded from depths of less than 30 metres (98 ft) and has been taken as deep as 120 metres (390 ft), possibly occurring at even greater depths. It is frequently observed in caves and under overhangs where it swims upside-down against the roofs of caves or archways. It is a solitary predatory species which feeds on smaller fishes and crustaceans. [2]

Utilisation

Cephalopholis polleni is a rather small and rare species and is of little interest to fisheries. It occasionally enters the aquarium trade. [1]

Taxonomy

Cephalopholis polleni was first formally described as Epinephelus polleni by the Dutch ichthyologist Pieter Bleeker (1819-1878) with the type locality given as Réunion. [5] Its specific name honours François Pollen (1842-1888), a Dutch naturalist and merchant, who collected the type when visiting Réunion with fellow Dutch naturalist and explorer Douwe Casparus van Dam (1827-1898). [6]

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References

  1. 1 2 3 Craig, M.T. (2018). "Cephalopholis polleni". IUCN Red List of Threatened Species . 2018: e.T132805A100457007. doi: 10.2305/IUCN.UK.2018-2.RLTS.T132805A100457007.en . Retrieved 20 November 2021.
  2. 1 2 3 4 Froese, Rainer; Pauly, Daniel (eds.) (2019). Cephalopholis &speciesname= polleni" Cephalopholis polleni " in FishBase. December 2019 version.
  3. 1 2 Heemstra, P.C. & J.E. Randall (1993). FAO Species Catalogue. Vol. 16. Groupers of the world (family Serranidae, subfamily Epinephelinae). An annotated and illustrated catalogue of the grouper, rockcod, hind, coral grouper and lyretail species known to date (PDF). FAO Fish. Synopsis. Vol. 125. FAO, Rome. pp. 54–55. ISBN   92-5-103125-8.
  4. 1 2 Dianne J. Bray. "Cephalopholis polleni". Fishes of Australia. Museums Victoria. Retrieved 16 June 2020.
  5. ↑ Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Epinephelus polleni". Catalog of Fishes . California Academy of Sciences . Retrieved 15 June 2020.
  6. ↑ Bleeker, P. (1868). "Description de deux espèces inédites d'Epinephelus rapportées de l'île de la Réunion par M.M. Pollen et van Dam". Verslagen en Mededeelingen der Koninklijke Akademie van Wetenschappen. Afdeeling Natuurkunde (Ser. 2) (in French). 2: 336–341.
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