Broomfin Dragonfish, Thysanactis dentex Regan & Trewavas 1930

Illustration of a type of the Broomfin Dragonfish, Thysanactis dentex. Source: Pl. 2 (fig. 1) in Regan & Trewavas (1930) / Carlsberg Foundation via EOL. License: CC by Attribution

Cite this page as:
Bray, D.J. 2017, Thysanactis dentex in Fishes of Australia, accessed 21 Jun 2024,

Broomfin Dragonfish, Thysanactis dentex Regan & Trewavas 1930

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Recorded from off Dampier, Western Australia, and Coral Sea. Elsewhere the species occurs in the Atlantic and Pacific Oceans, migrating vertically to above 75m during the night and to at least 1,500 m during the day.


Dorsal fin 17-18; Anal fin 21-25. 
Body slender; chin barbel as long as head, pigmented with white spots, barbel tip white with a small spindle-shaped bulb a minute, rounded terminal body.


Thysanactis is from the Greek thysanos = fringe or tassel, and aktis = ray, in reference to the isolated and produced pectoral-fin ray, with a tassel of 5 or 6 long unpigmented filaments.The specific name dentex refers to the long anterior fangs on both upper and lower jaws.

Species Citation

Thysanactis dentex Regan & Trewavas 1930, Dana Reports 1920–22 6: 58, fig. 35, pl. 2(1). Type locality: Caribbean Sea; western Atlantic.


Bray, D.J. 2017


Australian Faunal Directory

Broomfin Dragonfish, Thysanactis dentex Regan & Trewavas 1930


Gibbs, R.H. & Barnett, M.A. 1990. Melanostomiidae. pp. 308-337. In J.C. Quero, J.C. Hureau, C. Karrer, A. Post and L. Saldanha (eds) Check-list of the fishes of the eastern tropical Atlantic (CLOFETA). JNICT, Lisbon; SEI, Paris; and UNESCO, Paris. Vol. 1

Harold, A. 2015. Thysanactis dentex. The IUCN Red List of Threatened Species 2015: e.T21133167A21909582. Downloaded on 01 July 2017.

Regan, C.T. & Trewavas, E. 1930. The fishes of the families Stomiatidae and Malacosteidae. Dana Reports 1920–22 6: 1-143 figs 1-138 pls 1-14

Suntsov, A. & Domokos, R. 2013. Vertically migrating micronekton and macrozooplankton communities around Guam and the Northern Mariana Islands. Deep Sea Research Part I: Oceanographic Research Papers 71: 113-129.

Quick Facts

CAAB Code:37109036


Conservation:IUCN Least Concern

Depth:75-1500 m

Habitat:Epipelagic, mesopelagic, benthopelagic

Max Size:18 cm SL

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CAAB distribution map