Hime diactithrix (Prokofiev 2008)

Hime diactithrix. Source: Australian National Fish Collection, CSIRO. License: CC BY Attribution-Noncommercial

Cite this page as:
Bray, D.J. 2017, Hime diactithrix in Fishes of Australia, accessed 02 Dec 2022, https://fishesofaustralia.net.au/home/species/4911

Hime diactithrix (Prokofiev 2008)

More Info


Northern Western Australia, SW of Shark Bay to SW of Scott Reef, in depths of 199-299 m. Elsewhere the species is known from Vietnam and Japan.


Dorsal fin 17; Anal fin 10; Pectoral fin 12; Pelvic fin 9; Caudal fin viii + I + 9 + 8 + I = vii (viii–ix + I + 9 + 8 + I = vii–viii), Lateral line scales 38-42; Pyloric caecae 10-12; GR 13-15; Vertebrae 26-27 + 15-16 = 42.
Length of insertion of dorsal fin significantly exceeding distance from its end to beginning of adipose fin, eye diameter greater than snout length, dorsal fin with the second ray filamentous in males, and the last five rays elongated compared with the preceding rays.


Other names used in Australia: Hime formosana [Australian Faunal Directory]; Hime sp. 4 [of G. Yearsley]; Aulopus sp. 4 [of G. Yearsley]; Aulopus sp. [in Sainsbury et al, 1985]


The species name diactithrix  is from the Greek di (two), actis (ray), and thrix (filament), in reference to the extremely elongated second dorsal-fin ray in males.

Species Citation

Aulopus diactithrix Prokofiev 2008, J. Ichthyol. 48(1): 134, Fig. Type locality: Nha Trang Bay, Vietnam


Bray, D.J. 2017

Hime diactithrix (Prokofiev 2008)


Gomon, M.F., Struthers, C.D. & Stewart, A.L. 2013. A new genus and two new species of the Family Aulopidae (Aulopiformes), commonly referred to as aulopus, flagfins, sergeant bakers or threadsails, in Australasian waters. Species Diversity 18: 141–161. (as Hime formosanus)

Gomon, M.F. & Struthers, C.D. 2015. Three new fishes of the Indo-Pacific fish genus Hime (Aulopidae, Aulopiformes), all resembling the type species H. japonica (Günther 1877). Zootaxa 4044(3): 371-390.

Prokofiev, A.M. 2008. A new species of the genus Aulopus from the waters of Vietnam (Myctophiformes s. lato: Aulopidae). Journal of Ichthyology 48: 134–137.

Prokofiev, A.M. 2012. Conspecificity of Aulopus formosanus and A. diactithrix (Aulopidae) and differences between the populations from Taiwan and Vietnam. Journal of Ichthyology 52: 412–416.

Quick Facts

CAAB Code:37117002

Depth:190-300 m

Habitat:Reef associated

Max Size:17 cm SL

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