Pacific Squaretail, Tetragonurus pacificus Abe 1953

Other Names: Pacific Square-tail, Ravenfish
The Pacific Squaretail is known in Australia from larvae collected off Yonge Reef,  Queensland.

Cite this page as:
Bray, D.J. 2019, Tetragonurus pacificus in Fishes of Australia, accessed 02 Mar 2024,

Pacific Squaretail, Tetragonurus pacificus Abe 1953

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Known from larvae collected off Yonge Reef, Great Barrier Reef, Queensland. Elsewhere the species is known from scattered localities in the subtropical Indo-Pacific.


Dorsal-fin spines X-XI, 11-13; Anal fin I, 10-11; Pectoral fin 16; longitudinal scale rows along body axis 72-80; predorsal scales 17-20; Vertebrae 40.
Head length 26.1-28.6% SL; orbit diameter 7.3-8.9% SL; and longest pectoral-fin ray length 14.3-15.5% SL.


Blackish-grey with greenish reflection on lateral body axis, yellowish reflection on ventral region; head black with silver to gold reflection on cheek and operculum; dorsal surface of head, snout and lower jaw solid black; dorsal, anal, pelvic, and caudal fins blackish-grey, membranes paler; pectoral fin black.

Similar Species

Tetragonurus pacificus differs from T. atlanticus and T. cuvieri, in having fewer vertebrae (39–43, vs. 44–51 in T. atlanticus and 52–58 in T. cuvieri, respectively), 10–11 (9–12) first dorsal-fin spines (vs. 13–17 and 16–21, respectively), and 72–80 longitudinal scale rows along body axis (vs. 93–95 and 97–114, respectively) (Koeda & Teramura 2019).

Species Citation

Tetragonurus pacificus Abe 1953, Japanese Journal of Ichthyology 3(1): 45, figs 5-6. Type locality: west of Solomon Islands, western Pacific, 6°36.5'S, 152°29'E (stomach contents).


Bray, D.J. 2019


Atlas of Living Australia

Pacific Squaretail, Tetragonurus pacificus Abe 1953


Abe, T. 1953. New, rare or uncommon fishes from Japanese waters. II. Records of rare fishes of the families Diretmidae, Luvaridae and Tetragonuridae, with an appendix (description of a new species, Tetragonurus pacificus, from off the Solomon Islands). Japanese Journal of Ichthyology 3(1): 39-47 

Ahlstrom, E.H., Butler, J.L. & Sumida, B.Y. 1976. Pelagic Stromateoid fishes (Pisces, Perciformes) of the eastern Pacific: kinds, distributions, and early life histories and observations on five of these from the northwest Atlantic. Bulletin of Marine Science 26 (3): 285–402.

Haedrich, R.L. 1967. The stromateoid fishes: systematics and a classification. Bulletin of the Museum of Comparative Zoology 135(2): 31–139. See ref at BHL

Koeda, K. & Teramura, A. 2019 Redescription of Tetragonurus pacificus(Teleostei: Stromateoidei: Tetragonuridae), based on specimens collected from Taiwan and Tarawa Atoll. Zootaxa 4702(1): 026–031, open access

Last, P.R. 2001. Nomeidae, Ariommatidae, Tetragonuridae. pp. 3771-3785 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. 6 pp. 3381-4218. 

Munro, I.S.R. 1967. The Fishes of New Guinea. Port Moresby : Dept. Agric. Stock Fish. 651 pp. 23 figs 84 pls. 

Parin, N.V. & Piotrovsky, A.S. 2004. Stromateoid fishes (suborder Stromateoidei) of the Indian Ocean (species composition, distribution, biology, and fisheries). Journal of Ichthyology 44(Suppl. 1): 33-62

Quick Facts

CAAB Code:37449002

Species Maps

CAAB distribution map