HomeMarine aquarium fishWrassesThree-lined rainbowfish Three-lined rainbowfish (Stethojulis trilineata) Scientific name: Stethojulis trilineata Bloch & Schneider, 1801 The Three-lined rainbowfish (Stethojulis trilineata) is a marine fish of the family Labridae. Native range: Indo-West Pacific, Red Sea, Maldives to Samoa and Palau, north to Tokara Island, Japan, south to Montague Island (Australia). BiologyOften found on exposed reefs with shallow clear water. Usually swim in loose groups along upper parts of drop-offs or above reef crests.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameStethojulis trilineataFamilyLabridae (Wrasses)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length15.0Depth range1–20 m (3–66 ft)EnvironmentMarine; reef-associated; depth range 1 - 20 mClimateTropicalDistributionIndo-West Pacific: Red Sea, Maldives to Samoa and Palau, north to Tokara Island, Japan, south to Montague Island (Australia).Conservation status (IUCN)Least Concern (LC)Threat to humansHarmlessUsesFisheries: subsistence fisheries; aquarium: commercialResilienceHigh, minimum population doubling time less than 15 months (K>1) More wrassesCutribbon wrasseStethojulis interruptaPale-barred corisCoris dorsomaculaNebulous wrasseHalichoeres nebulosusOrnamented wrasseHalichoeres ornatissimusCircle-cheek wrasseHalichoeres miniatusJordan's tuskfishChoerodon jordaniSee 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