HomeMarine aquarium fishWrassesBluntheaded wrasse Bluntheaded wrasse (Thalassoma amblycephalum) Scientific name: Thalassoma amblycephalum Bleeker, 1856 The Bluntheaded wrasse (Thalassoma amblycephalum) is a marine fish of the family Labridae. In the aquarium it needs water at 24–28°C (75–82°F). Bluntheaded wrasse care at a glanceTemperature24–28°C (75–82°F) BiologyDorsal spines (total): 8; Dorsal soft rays (total): 13; Anal spines: 3; Anal soft rays: 10 - 11. Juveniles easily identified by the color pattern and rounded snout. Males become brightly colored and head usually green with a yellow band following on the body. Head naked, no scales dorsally on opercle. Initial phase with a broad blackish stripe from snout through eye to caudal-fin base (Ref 9823).Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameThalassoma amblycephalumFamilyLabridae (Wrasses)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length16.0Depth range1–15 m (3–49 ft)EnvironmentMarine; reef-associated; depth range 1 - 15 m, usually 1 - 15 mClimateSubtropicalDistributionIndo-Pacific: Somalia and South Africa to the Line, Marquesan, and Tuamoto islands, north to southern Japan, south to Rowley Shoals, northern New Zealand and Lord Howe and Rapa islands.Conservation status (IUCN)Least Concern (LC)Threat to humansHarmlessUsesFisheries: of no interest; aquarium: commercialResilienceMedium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.) More wrassesSixbar wrasseThalassoma hardwickeThree-ribbon wrasseStethojulis strigiventerJansen's wrasseThalassoma janseniiRed shoulder wrasseStethojulis bandanensisMoon wrasseThalassoma lunareYellow-brown wrasseThalassoma lutescensSee 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