Scientific Name
Naso thynnoides  
Naso thynnoides擬鮪鼻魚
by: Lab of Fish Ecol. and Evo., BRCAS
Author (Cuvier, 1829) Depth 2 - 40M
Chinese 擬鮪鼻魚 Poisonous Fish No 
Family_Chinese 刺尾鯛科 Economic Fish Yes 
Family F470 Acanthuridae Edible Fish Yes  Chinese In Mainland China 單板鼻魚 
Max Length 40 cm  Aquarium Fish Yes  Common Name 剝皮仔、打鐵婆、鬼角(臺東) 
Distribution in World India Ocean to West Pacific Ocean   Distribution in Taiwan South、ShaoLiuChew、LanI Is.、Greeb IS. 
Habitats Coral、Coastal、Lagoon、Coral&Sand  Holotype Locality New Guinea 
Synonyms Axinurus thynnoides, Naso thynoides   
Reference 臺灣魚類誌(沈等, 1993);Fishes of Japan(Nakabo, 2002)  沈世傑 編 Shih-Chieh Shen ed. 1993 Nakabo T. 2002 Nakabo T. 2002 
Specimen List ASIZP0057400. ASIZP0059396. ASIZP0806724. ASIZP0916724. FRIP22297. FRIP22414. NMMBP02373. NMMBP08741. NMMSTP00194.  
Barcode2015-10-23,Chia-Hao Chang,CO1,%
Common Name Oneknife unicorn; Oneknife unicornfish; Singlespine unicornfish; Thunny unicornfish; Barred unicornfish 
Redlist Status NL Not in IUCN Redlist     
Characteristic Dorsal-fin rays IV-V, 28-30 ; anal-fin rays II, 28-30 ; pectoral-fin rays16-18 ; pelvic-fin rays I,3.Body elongate-ovate. Dorsal and anal profiles nearly even. Forehead without rostral prominence when in adults. Candal peduncular plate single, with a semicircular, retrorsely curved keel. Body gray, paler ventrally, with about 30 narrow dark bluish gray bars on body and irregular spots on head; a borad diffuse yellow stripe on side of body; candal peduncular plate and keel dusky; caudal fin bluish gray.
habitats Usually seen in small roving aggregations feeding on zooplankton and algae. Occur both in the protected waters of lagoons and in exposed outer reef areas from the shallows to at least 40m. Sleep on reefs at night at which time they take on a disruptive mo 
Distribution Indo-West Pacific: East Africa to Papua New Guinea, north to southern Japan. Taiwan: South, Hsiaoliuchiu, Lanyu, Lyudao.  
Utility Commercial fishery and aquarium species.