HomeMarine aquarium fishWrassesBlackeye thicklip Blackeye thicklip (Hemigymnus melapterus) Scientific name: Hemigymnus melapterus Bloch, 1791 The Blackeye thicklip (Hemigymnus melapterus) is a marine fish of the family Labridae. In the aquarium it needs water at 24–28°C (75–82°F). Native range: Indo-Pacific, Red Sea and East Africa to Micronesia, Samoa, and Polynesia. Blackeye thicklip care at a glanceTemperature24–28°C (75–82°F) BiologyDorsal spines (total): 9; Dorsal soft rays (total): 10-11; Anal spines: 3; Anal soft rays: 11. Lips thick with age. Color varies drastically with age and sex. Juveniles and sub adults are almost white anteriorly and abruptly dark green and black posteriorly; those under about 8 cm have a bright yellow tail which slowly fades with growth. The colorful pink and blue facial markings around the eyes of juveniles spreads with growth to cover nearly the entire head of large adults.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameHemigymnus melapterusFamilyLabridae (Wrasses)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length90.0Common length50.0Depth range1–30 m (3–98 ft)EnvironmentMarine; reef-associated; depth range 1 - 30 m, usually 5 - 30 mClimateTropicalDistributionIndo-Pacific: Red Sea and East Africa to Micronesia, Samoa, and Polynesia.Conservation status (IUCN)Least Concern (LC)Threat to humansHarmlessUsesFisheries: minor commercial; gamefish: yes; aquarium: commercialResilienceVery Low, minimum population doubling time more than 14 years (Preliminary K or Fecundity.) More wrassesBarred thicklipHemigymnus fasciatusRing wrasseHologymnosus annulatusThreespot wrasseHalichoeres trimaculatusPastel ringwrasseHologymnosus doliatusZigzag wrasseHalichoeres scapularisRedspot wrassePseudocoris yamashiroiSee 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