Threadtail Anthias, Tosana niwae Smith & Pope 1906

Other Names: Slender Fairy-basslet

A Threadtail Anthias, Tosana niwae, from Taiwan - ASIZ P0067759 . Source: Fish Database of Taiwan / License: CC BY Attribution-Noncommercial

A rosy coloured anthias with trailing caudal-fin lobes and filaments on the pelvic fins. Females and juveniles have a yellow stripe through the eye to the upper part of the caudal-fin base, a yellow margin on the dorsal-fin, and yellow caudal-fin lobes. Males have yellow stripe from behind the eye to above the pectoral-fin base, another yellow stripe running from the upper lip beneath the eye to the rear of the gill cover, a reddish blotch on the side, a reddish dorsal-fin margin and a reddish blotch on each caudal-fin lobe.

Video of Tosana niwae in an aquarium.

Cite this page as:
Bray, D.J. 2019, Tosana niwae in Fishes of Australia, accessed 15 Jul 2020,

Threadtail Anthias, Tosana niwae Smith & Pope 1906

More Info


Northeast of Darwin, Northern Territory, to off Newcastle, New South Wales. Elsewhere the species occurs in the tropical, Indo-west Pacific.
Inhabits deeper coastal sandy or muddy areas.


Dorsal fin X, 13-14; Anal fin III, 6-7; Pelvic fin I, 5; Pectoral fin 13-17; Gill rakers 23-25 (lower limb); Lateral-line scales 34-37.

Third dorsal-fin spine and 3rd rays elongated as filaments; middle pectoral fin-ray longer than other rays; caudal fin forked. Scales ctenoid.


The species is named for Mr. H. Niwa, director of the Fishery Experiment Station of Kochi prefecture at Susaki, Tosa, Japan.

Species Citation

Tosana niwae Smith & Pope, 1906, Proc. U. S. Natl. Mus. 31(1489): 470, fig. 4. Type locality: Urado Bay in Tosa, southern Japan.


Bray, D.J. 2019


Atlas of Living Australia

Threadtail Anthias, Tosana niwae Smith & Pope 1906


Anderson, W. D., Jr. 2018. Annotated checklist of anthiadine fishes (Percoidei: Serranidae). Zootaxa 4475(1): 1-62.  (as Pseudanthias albofasciatus)

Fowler, H.W. & Bean, B.A. 1930. Contributions to the biology of the Philippine Archipelago and adjacent regions. The fishes of the families Amiidae, Chandidae, Duleidae and Serranidae, obtained by the United States Bureau of Fisheries Steamer Albatross, in 1907 to 1910, chiefly in the Philippine Islands and adjacent seas. Bulletin of the United States National Museum 100(10): 1-334 figs 1-27 See ref at BHL

Gill, A.C., Anderson, W.D. Jr. & Williams, J.T. 2019. Anthias albofasciatus Fowler and Bean, 1930, a junior synonym of Tosana niwae Smith and Pope, 1906 (Teleostei: Serranidae: Anthiadinae). Zootaxa 4614(3): 566-574

Kuiter, R.H. 2004. Basslets, Hamlets and their relatives. A comprehensive guide to selected Serranidae and Plesiopidae. Chorleywood, UK : TMC Publishing 1, 216 pp. ((as Pseudanthias albofasciatus and Tosana niwae)

Heemstra, P.C. & Randall, J.E. 1999. Family Serranidae. pp. 2442-2548 in Carpenter, K.E. & Niem, T.H. (eds). The Living Marine Resources of the Western Central Pacific. FAO Species Identification Guide for Fisheries Purposes. Rome : FAO Vol. 4 pp. 2069-2790. (as Pseudanthias albofasciatus and Tosana niwae)

Masuda, H., Amaoka, K., Araga, C., Uyeno, T. & Yoshino, T. (eds) 1984. The Fishes of the Japanese Archipelago. Tokyo : Tokai University Press Vol. 1–2 437 pp. 247 figs 370 pls.

Nakabo, T. (ed.) 2002. Fishes of Japan with pictorial keys to the species. English edition.. Tokyo : Toikai University Press Vol. 1 pp.1-866.

Randall, J.E. 1995. Coastal Fishes of Oman. Bathurst : Crawford House Publishing 439 pp.

Smith, H.M. & Pope, T.E.B. 1906. List of fishes collected in Japan in 1903, with descriptions of new genera and species. Proceedings of the United States National Museum 31(1489): 459-499 figs 1-12 See ref at BHL

Quick Facts

Behaviour:Sandy, silty areas


Depth:80-220 m

Fishing:Aquarium fish (rare)

Max Size:16 cm SL

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CAAB distribution map