Oneline Wrasse, Labrichthys unilineatus (Guichenot 1847)

Other Names: Onelined Wrasse, One-lined Wrasse, Tube-lip, Tubelip Wrasse, Tube-mouth, Tube-mouth Wrasse

A terminal phase (male) Oneline Wrasse, Labrichthys unilineatus, in Coral Bay, Ningaloo Reef, Western Australia, 17 Sep 2015. Source: Keith Ross-Jones. License: All rights reserved

The yellowish-brown males have narrow bright blue stripes along the sides, and a broad whitish to pale yellow bar behind the pectoral-fin base. Females lack the pale bar on the sides and are duller in colour than males. Juveniles are dark brown with a white to pale bluish midlateral stripe, and a narrower stripe along the lower side. The thick fleshy 'tubular' lips are often yellow.

Cite this page as:
Bray, D.J. 2017, Labrichthys unilineatus in Fishes of Australia, accessed 10 Jul 2020,

Oneline Wrasse, Labrichthys unilineatus (Guichenot 1847)

More Info


Recorded in Australia from the Houtman Abrolhos to the Monte Bello Islands, WA, also Rowley Shoals and Scott Reef  WA, Ashmore Reef, Timor Sea, and the Torres Strait to the Capricorn Group, Great Barrier Reef, QLD; also at Lord Howe Island in the Tasman Sea, and Christmas Island in the Indian Ocean. Found elsewhere in the Indo-west-central Pacific. 
Inhabits areas with dense coral cover in shallow lagoon and semi-protected seaward reefs. 


Meristic features: Dorsal fin IX, 11-12; Anal fin III, 10-11. 


Feeds on coral polyps, especially those of the genus Acropora (staghorn corals).


The Oneline Wrasse is the only species in the genus Labrichthys. The common name refers to the pale midlateral stripe of juveniles.

Species Citation

Cossyphus unilineatus Guichenot, 1847, Rev. Zool. Paris 10: 284. Type locality: Guam.


Bray, D.J. 2017

Oneline Wrasse, Labrichthys unilineatus (Guichenot 1847)


Allen, G.R. & Erdmann, M.V. 2012. Reef fishes of the East Indies. Perth : Tropical Reef Research 3 vols, 1260 pp.

Allen, G.R. & Steene, R.C. 1979. The Fishes of Christmas Island, Indian Ocean. Australian National Parks and Wildlife Service Special Publication 2. Canberra : Australian Government Publishing Service 81 pp. 15 pls.

Allen, G.R. & Swainston, R. 1988. The Marine Fishes of North-Western Australia. A field guide for anglers and divers. Perth, WA : Western Australian Museum vi 201 pp., 70 pls.

Cole, A.J, Pratchett, M.S. & Jones, G.P. 2010. Corallivory in tubelip wrasses: diet, feeding and trophic importance. Journal of Fish Biology 76(4): 818-835.

Francis, M.P., 1993. Checklist of the coastal fishes of Lord Howe, Norfolk, and Kermadec Islands, Southwest Pacific Ocean. Pacific Science 47(2): 136-170.

Guichenot, A. 1847. Description de deux nouvelles espèces de Cossyphes. Revue de Zoologie, Paris 10: 282-284.

Kuiter, R.H. 1992. Tropical Reef-Fishes of the Western Pacific, Indonesia and Adjacent Waters. Jakarta : PT Gramedia Pustaka Utama 314 pp. pls.

Kuiter, R.H. 1996. Guide to Sea Fishes of Australia. A comprehensive reference for divers and fishermen. Sydney, NSW, Australia : New Holland Publishers xvii, 434 pp.

Kuiter, R.H. 2002. Fairy and rainbow wrasses and their relatives – a comprehensive guide to selected labrids. TMC Publishing, Chorleywood, UK.

Marshall, T.C. 1964. Fishes of the Great Barrier Reef and Coastal Waters of Queensland. Sydney : Angus & Robertson 566 pp. 136 pls.

Pollard, D. 2010. Labrichthys unilineatus. The IUCN Red List of Threatened Species. Version 2014.2. . Downloaded on 14 November 2014.

Randall, J.E., 2005. Reef and shore fishes of the South Pacific. New Caledonia to Tahiti and the Pitcairn Islands. University of Hawaii Press, Honolulu, Hawaii. 720 p.

Randall, J.E., Allen, G.R. & Steene, R.C. 1990. Fishes of the Great Barrier Reef and Coral Sea. University of Hawaii Press, Honolulu, Hawaii.

Randall, J.E. & Springer, V.C. 1973. The monotypic Indo-Pacific labrid fish genera Labrichthys and Diproctacanthus with description of a new related genus, Larabicus. Proceedings of the Biological Society of Washington 86(23): 279-298.

Sano, M., Shimizu, M. & Nose, Y. 1984. Food habits of teleostean reef fishes in Okinawa Island, southern Japan.University of Tokyo Press, Tokyo, Japan. 128 pp.

Westneat, M.W. 2001. Labridae. pp. 3381-3467 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.

Quick Facts

CAAB Code:37384129

Conservation:IUCN Least Concern

Depth:0-20 m

Fishing:Aquarium fish

Habitat:Reef associated

Max Size:20 cm TL

Species Maps

CAAB distribution map