HomeMarine aquarium fishWrassesBlue humphead parrotfish Blue humphead parrotfish (Chlorurus cyanescens) Scientific name: Chlorurus cyanescens Valenciennes, 1840 The Blue humphead parrotfish (Chlorurus cyanescens) is a marine fish of the family Scaridae. Native range: Western Indian Ocean, known only from Natal (South Africa), Zanzibar (Tanzania), Madagascar, and Mauritius, but probably more widespread. BiologyFound around deep rocky reefs up to a depth of at least 30 m. Solitary or in small groups. Also caught with nets and other kinds of artisanal gear. Mainly sold fresh.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameChlorurus cyanescensFamilyScaridae (Parrotfishes)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length50.0Depth range5 m (16 ft)EnvironmentMarine; reef-associated; non-migratory; depth range 5 - ? mClimateTropicalDistributionWestern Indian Ocean: known only from Natal (South Africa), Zanzibar (Tanzania), Madagascar, and Mauritius, but probably more widespread.Conservation status (IUCN)Least Concern (LC)Threat to humansHarmlessUsesFisheries: commercial; aquarium: commercialResilienceMedium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.) More wrassesBluemoon parrotfishChlorurus atrilunulaCandelamoa parrotfishHipposcarus haridSpectacled parrotfishChlorurus perspicillatusBelted wrasseStethojulis balteataYellowstripe corisCoris flavovittataElegant corisCoris venustaSee all wrasses SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026