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Chlorurus japanensis (Bloch, 1789)

Palecheek parrotfish
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Chlorurus japanensis   AquaMaps   Data sources: GBIF OBIS
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Image of Chlorurus japanensis (Palecheek parrotfish)
Chlorurus japanensis
Male picture by Randall, J.E.

Classification / Names Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (ray-finned fishes) > Perciformes (Perch-likes) > Scaridae (Parrotfishes) > Scarinae
Etymology: Chlorurus: Greek, chloros = green + Greek oura = tail (Ref. 45335).  More on author: Bloch.

Environment: milieu / climate zone / depth range / distribution range Ecology

Marine; reef-associated; depth range 1 - 20 m (Ref. 9710).   Tropical; 30°N - 24°S, 102°E - 153°W

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

Pacific Ocean: Ryukyu Islands to Australia. Recently reported from Tonga (Ref. 53797).

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 31.0 cm TL male/unsexed; (Ref. 9710); max. published weight: 700.00 g (Ref. 3488)

Short description Morphology | Morphometrics

Dorsal spines (total): 9; Dorsal soft rays (total): 10; Anal spines: 3; Anal soft rays: 9. This species is further distinguished by having the following characters: median predorsal scales 4; scale rows on cheek 2; conical teeth absent on side of lower dental plate, 0-2 on upper plate of initial phase and often 2 on terminal male; lips slightly covers the dental plates; caudal fin in subadult slightly rounded to truncate and slightly emarginate in terminal male. Colour of male distinctly bicolored, with purple-brown anterior, and oblique division to pale yellow posterior; female entirely dark brown with red-orange tail (Ref. 9793, 90102).

Biology     Glossary (e.g. epibenthic)

Inhabits seaward coral (Ref. 58652) and rocky reefs (Ref. 9710); inner reefs with rich coral habitat (Ref. 48636). Feeds on benthic algae (Ref. 3488). May occur in small groups of 1 TP with 1 to 3 IPs (Ref. 9793). Caught mainly with traps, nets and other types of artisanal gear. Minimum depth reported from Ref. 90102.

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Oviparous, distinct pairing during breeding (Ref. 205).

Main reference Upload your references | References | Coordinator : Westneat, Mark | Collaborators

Randall, J.E. and J.H. Choat, 1980. Two new parrotfishes of the genus Scarus from the Central and South Pacific, with further examples of sexual dichromatism. Zool. J. Linn. Soc. 70:383-419. (Ref. 2689)

IUCN Red List Status (Ref. 119314)

  Least Concern (LC) ; Date assessed: 16 September 2009

CITES (Ref. 115941)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless





Human uses

Fisheries: commercial; aquarium: commercial
FAO(Publication : search) | FishSource |

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Estimates of some properties based on models

Preferred temperature (Ref. 115969): 25 - 29.3, mean 28.5 (based on 2061 cells).
Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01413 (0.00659 - 0.03029), b=3.04 (2.87 - 3.21), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trophic Level (Ref. 69278):  2.0   ±0.00 se; Based on food items.
Resilience (Ref. 69278):  High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153):  Low vulnerability (23 of 100) .
Price category (Ref. 80766):   High.