HomeFreshwater aquarium fishOther freshwater fishHarlequin sweetlips Harlequin sweetlips (Plectorhinchus chaetodonoides) Scientific name: Plectorhinchus chaetodonoides Lacep?de, 1801 The Harlequin sweetlips (Plectorhinchus chaetodonoides) is a brackish-water fish of the family Haemulidae. Native range: Indian Ocean, Maldives and Cocos Islands. Western Pacific: Sumatra to Fiji and New Caledonia, north to Ryukyu Islands, south to Rowley Shoals. BiologyInhabits coral-rich areas of clear lagoon and seaward reefs. Adults are solitary, near and under ledges or caves by day. Juveniles are found among corals. Feeds on crustaceans, mollusks, and fishes at night. Juveniles are used in the aquarium industry. Small juveniles may mimic a toxic flatworm.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific namePlectorhinchus chaetodonoidesFamilyHaemulidae (Grunts)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length72.0Common length60.0Depth range1–30 m (3–98 ft)EnvironmentMarine; brackish; reef-associated; depth range 1 - 30 mClimateTropicalDistributionIndian Ocean: Maldives and Cocos Islands. Western Pacific: Sumatra to Fiji and New Caledonia, north to Ryukyu Islands, south to Rowley Shoals.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: minor commercial; aquarium: commercialResilienceLow, minimum population doubling time 4.5 - 14 years (Preliminary K or Fecundity.) More other freshwater fishSouth American lungfishLepidosiren paradoxaLined soleAchirus lineatusPumpkinseedLepomis gibbosusShort-tailed pipefishMicrophis brachyurus brachyurusFinescale tigerfishDatnioides microlepisFreshwater garfishXenentodon cancilaSee all other freshwater fish SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026