Thomas' Threefin, Norfolkia thomasi Whitley 1964

Other Names: Thomas' Triplefin

Thomas' Threefin, Norfolkia thomasi, from Taravai, Gambier Islands, French Polynesia. Source: Jeffrey T. Williams / Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes. License: CC BY Attribution-Noncommercial-ShareAlike

A whitish triplefin with yellow to orange scale edges, six irregular oblique dark brown bands along the upper side that divide on the lower side, and an uneven white-edged brown bar below the eye. Females have narrow, oblique red and white bands on the second and third dorsal fins, while males have brownish-orange dorsal fins.

Cite this page as:
Norfolkia thomasi in Fishes of Australia, accessed 23 Jul 2024,

Thomas' Threefin, Norfolkia thomasi Whitley 1964

More Info


Northern Great Barrier Reef, Queensland, to at least Byron Bay, New South Wales. Elsewhere the species occurs in the south-west Pacific (north to the Ryukyus, Japan, and east to the Tuamoto Archipelago).
Inhabits shallow coral reefs and tidepools.


Dorsal fin IV + XIV-XV + 9-11; Pectoral fin usually 15; Lateral line discontinuous, 12-15 + 24-27; Mandibular pores 3 + 2 + 3.
Head scaled forward to behind the eye, scales absent from cheek; supraorbital tentacle lobate.

Species Citation

Norfolkia thomasi Whitley1964, Rec. Aust. Mus. 26(5): 192. Type locality: Heron Island, QLD. 


Australian Faunal Directory

Thomas' Threefin, Norfolkia thomasi Whitley 1964


Fricke, R 1997. Tripterygiid fishes of the western and central Pacific, with descriptions of 15 new species, including an annotated checklist of world Tripterygiidae (Teleostei). Theses Zoologicae 29: 1-607 figs 1-110 

Fricke, R. 1994. Tripterygiid fishes of Australia, New Zealand and the Southwest Pacific Ocean, with descriptions of 2 new genera and 16 species (Teleostei). Theses Zoologicae 24: 1-585 figs 1-130 

Johnson, J.W. 2010. Fishes of the Moreton Bay Marine Park and adjacent continental shelf waters, Queensland, Australia. pp. 299-353 in Davie, P.J.F. & Phillips, J.A. Proceedings of the Thirteenth International Marine Biological Workshop, The Marine Fauna and Flora of Moreton Bay. Memoirs of the Queensland Museum 54(3) 

Randall, J.E. 2005. Reef and shore fishes of the South Pacific. New Caledonia to Tahiti and the Pitcairn Islands. Honolulu : University of Hawaii Press 707 pp.

Randall, J.E., Allen, G.R. & Steene, R. 1997. Fishes of the Great Barrier Reef and Coral Sea. Bathurst : Crawford House Press 557 pp. figs. 

Whitley, G.P. 1964. Fishes from the Coral Sea and the Swain Reefs. Records of the Australian Museum 26(5): 145-195 figs 1-15 pls 8-10

Williams, J. & Holleman, W. 2014. Norfolkia thomasi. The IUCN Red List of Threatened Species 2014: e.T179043A1562928. Downloaded on 17 April 2017.

Quick Facts

CAAB Code:37415026

Conservation:IUCN Least Concern

Depth:1-20 m

Habitat:Reef associated

Max Size:5 cm SL

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