Big-nosed Deepsea Batfish, Halieutopsis nasuta (Alcock 1891)

Illustration of the holotype of Halieutopsis nasuta. Source: Alcock (1899) Naturalist in Indian Seas : or, Four Years with the Royal Indian Marine Survey Ship 'Investigator': Pl. 7 (fig. 1). License: Public Domain

A bluish-black seabat with a dark vermicular pattern on the upper side, and the edge of the disk and anterior part of the abdomen jet-black. 

Many publications refer to this species as Dibranchus nasutus.

Cite this page as:
Bray, D.J. 2023, Halieutopsis nasuta in Fishes of Australia, accessed 23 May 2024,

Big-nosed Deepsea Batfish, Halieutopsis nasuta (Alcock 1891)

More Info


North West Shelf and off Rowley Shoals, Western Australia, and northeast of Raine Island, Queensland to off Broken Bay, New South Wales. Elsewhere the species occurs in the tropical, Indo-west Pacific: Indonesia, Philippines, Solomon Islands, New Caledonia, Vanuatu.
Depth range 297-1141 m, mostly between 300-600 m.


The specific name is from the Latin nasutus (= large-nosed), in reference to the broad rostrum “broadly expanded snout-bones project far beyond the deep semicircular cavity which lies beneath them”.

Species Citation

Dibranchus nasutus Alcock 1891, Ann. Mag. Nat. Hist. (6) 8 (43/44): 24, Pl. 7 (fig. 1). Type locality: Andaman Sea, 11°31'40"N, 92°46'40"E, Investigator station 115, depth 188-220 fathoms.


Bray, D.J. 2023


Atlas of Living Australia

Big-nosed Deepsea Batfish, Halieutopsis nasuta (Alcock 1891)


Alcock, A. 1891. Class Pisces. In, II. – Natural history notes from H. M. Indian marine survey steamer Investigator, Commander R.F. Hoskyn, R.N., commanding.–Series II., No. 1. On the results of deep-sea dredging during the season 1890-91. Annals and Magazine of Natural History 6 8(2,15): 16-34, 119-138 figs 1-5 pls 7-8 See ref at BHL

Alcock, A.W. 1898. Illustrations of the zoology of the Royal Indian marine surveying steamer Investigator,...Fishes. Calcutta. Part 5: no p., Pls. 18-24. See ref at BHL

Alcock, A.W. 1902. A Naturalist in Indian Seas. Or, Four Years with the Royal Indian Marine Survey Ship ’Investigator‘. London, xxiv+ 328 pp., figs. 1–98. See ref at BHL

Bradbury, M.G. 1967. The genera of batfishes. Copeia 1967(2): 399-422. (as Halieutopsis vermicularis)

Bradbury, M.G. 1988. Rare fishes of the deep-sea genus Halieutopsis: a review with descriptions of four new species (Lophiiformes: Ogcocephalidae). Fieldiana Zoology New Series 44: 1-22 (as Halieutopsis vermicularisSee ref at BHL

Bradbury, M.G. 1999. Family Ogcocephalidae. pp. 2023-2025 in Carpenter, K.E. & Niem, V.H. (eds). The Living Marine Resources of the Western Central Pacific. FAO Species Identification Guide for Fisheries Purposes. Rome : FAO Vol. 3 pp. 1397-2068. (as Halieutopsis vermicularis)

Bradbury, M.G. 1999. A review of the fish genus Dibranchus with descriptions of new species and a new genus, SolocisquamaProceedings of the California Academy of Sciences 51(5): 259-310.  See ref at BHL

Bradbury, M.G. 2003. Family Ogcocephalidae Jordan 1895 -- batfishes. California Academy of Sciences Annotated Checklists of Fishes No. 17: 1-17. (as incertae sedis)

Ho, H.-C. 2021. Taxonomy and distribution of the deep-sea batfish genus Halieutopsis (Teleostei: Ogcocephalidae), with descriptions of five new species. Journal of Marine Science and Engineering 10(1): 1-64.

Smith, H.M. & Radcliffe, L. 2012. New pediculate fishes from the Philippine Islands and contiguous waters. pp. 199-214, Pls. 16-27 in Radcliffe, L. Scientific results of the Philippine cruise of the Fisheries steamer "Albatross," 1907-1910. No. 16. Proceedings of the United States National Museum 42(1896). See ref at BHL

Quick Facts

CAAB Code:37212044

Depth:297-1141 m

Habitat:Demersal, continental slope

Max Size:14 cm TL

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CAAB distribution map