HomeMarine aquarium fishWrassesBlacktail wrasse Blacktail wrasse (Thalassoma ballieui) Scientific name: Thalassoma ballieui Vaillant & Sauvage, 1875 The Blacktail wrasse (Thalassoma ballieui) is a marine fish of the family Labridae. Native range: Eastern Central Pacific, Hawaiian Islands and Johnston Island. BiologyInhabits clear lagoon and seaward reefs. Benthopelagic over coral and rocks. Feeds on benthic invertebrates and small fishes.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameThalassoma ballieuiFamilyLabridae (Wrasses)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length39.5Depth range1–60 m (3–197 ft)EnvironmentMarine; reef-associated; non-migratory; depth range 1 - 60 mClimateTropicalDistributionEastern Central Pacific: Hawaiian Islands and Johnston Island.Conservation status (IUCN)Least Concern (LC)Threat to humansHarmlessUsesAquarium: commercialResilienceMedium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.) More wrassesSaddle wrasseThalassoma duperreyFlame wrasseCirrhilabrus jordaniGeoffroy's wrasseMacropharyngodon geoffroyRazor wrasse fishIniistius umbrilatusHawaiian cleaner wrasseLabroides phthirophagusGreen birdmouth wrasseGomphosus caeruleusSee 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