Sixbar Wrasse, Thalassoma hardwicke (Bennett 1829)


Other Names: Six-banded Wrasse, Six-bar Wrasse, Sixbarred Wrasse, Six-barred Wrasse

A Sixbar Wrasse, Thalassoma hardwicke, at Lizard island, Great Barrier Reef, Queensland. Source: Andy Lewis / Lizard Island Field Guide http://lifg.australianmuseum.net.au/Hierarchy.html. License: CC BY Attribution

Summary:
A pale greenish or bluish-green wrasse with six elongated wedge-shaped black bars that become progressively shorter towards the tail, and broad pink bands radiating from the eye. Males (terminal phase) are brighter in colour than females (initials phase).

Cite this page as:
Bray, D.J. 2020, Thalassoma hardwicke in Fishes of Australia, accessed 09 Dec 2022, https://fishesofaustralia.net.au/home/species/284

Sixbar Wrasse, Thalassoma hardwicke (Bennett 1829)

More Info


Distribution

Rottnest Island to Cape Londonderry, and offshore reefs of north Western Australia, Ashmore Reef in the Timor Sea, and the far northern Great Barrier reef, Queensland, and reefs in the Coral Sea, to at least Sydney, New South Wales; also Cocos (Keeling) Islands and Christmas Island in the eastern Indian Ocean, and the Lord Howe Province and Norfolk Island in the Tasman Sea. The Sixbar Wrasse may also occur on reefs in the Northern Territory. Elsewhere the species occurs in the tropical, Indo-west-central Pacific.
Individuals or small groups inhabit shallow lagoon and seaward reefs, reef slopes and drop-offs at depths to 15 m.

Feeding

Feeds on benthic and planktonic invertebrates and fishes, especially crustaceans, fish eggs, small fishes, and foraminiferans.

Biology

A protogynous hermaphrodite, with females able to change sex to become males during their life cycle.

Etymology

The species is named in honour of Thomas Hardwicke “for whose ready and able assistance in this work, the Author is desirous to record his gratitude”.

Species Citation

Sparus hardwicke Bennett  1829, A selection from the most remarkable and interesting fishes found on the coast of Ceylon: 12, pl. 12. Type locality: Sri Lanka (as Ceylon).

Author

Bray, D.J. 2020

Resources

Atlas of Living Australia

Sixbar Wrasse, Thalassoma hardwicke (Bennett 1829)

References


Allen, G.R. 1993. Fishes of Ashmore Reef and Cartier Island. Records of the Western Australian Museum, Supplement 44: 67-91 

Allen, G.R. 1997. Marine Fishes of Tropical Australia and South-east Asia. Perth : Western Australian Museum 292 pp. 106 pls. 

Allen, G.R., Hoese, D.F., Paxton, J.R., Randall, J.E., Russell, B.C., Starck, W.A., Talbot, F.H. & Whitley, G.P. 1976. Annotated checklist of the fishes of Lord Howe Island. Records of the Australian Museum 30(15): 365-454 figs 1-2 (as Thalassoma hardwickei)

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

Allen, G.R. & Smith-Vaniz, W.F. 1994. Fishes of Cocos (Keeling) Islands. Atoll Research Bulletin 412: 1-21 

Allen, G.R. & Steene, R.C. 1988. Fishes of Christmas Island Indian Ocean. Christmas Island : Christmas Island Natural History Association 197 pp. 

Allen, G.R., Steene, R.C. & Orchard, M. 2007. Fishes of Christmas Island. Christmas Island : Christmas Island Natural History Association 2 edn, 284 pp. 

Bennett, J.W. 1829. A Selection of Rare and Curious Fishes found upon the Coast of Ceylon. First Edition, London 6 Pts pls 11–15 with facing unnumbered pages. See ref at BHL

Bernardi, G., Bucciarelli, G., Costagliola, D., Robertson, D.R. & Heiser, J.B. 2004. Evolution of coral reef fish Thalassoma spp. (Labridae). 1. Molecular phylogeny and biogeography. Marine Biology, Berlin 144: 369-375, 405 

Choat, J.H., van Herwerden, L., Robbins, W.D., Hobbs, J.P. & Ayling, A.M. 2006. A report on the ecological surveys undertaken at Middleton and Elizabeth Reefs, February 2006. Report by James Cook University to the Department of the Environment and Heritage. 65 pp. 

Fowler, H.W. 1904. A collection of fishes from Sumatra. Journal of the Academy of Natural Sciences of Philadelphia 2 12(4): 495-560 pls 1-21 

Francis, M. 1993. Checklist of the coastal fishes of Lord Howe, Norfolk, and Kermadec Islands, southwest Pacific Ocean. Pacific Science 47(2): 136-170 figs 1-2

Francis, M.P. 2019. Checklist of the coastal fishes of Lord Howe, Norfolk and Kermadec Islands, southwest Pacific Ocean. figshare. Collection. https://doi.org/10.6084/m9.figshare.c.4428305.v2

Gill, A.C. & Reader, S.E. 1992. Fishes. pp. 90-93, 193-228 in Hutchings, P. (ed.)  Reef Biology. A Survey of Elizabeth and Middleton Reefs, South Pacific. Canberra : Australian National Parks Vol. 3, Kowari 230 pp. 

Hobbs, J-P.A., Newman, S.J., Mitsopoulos, G.E.A., Travers, M.J., Skepper, C.L., Gilligan, J.J., Allen, G.R., Choat, H.J. & Ayling, A.M. 2014. Checklist and new records of Christmas Island fishes: the influence of isolation, biogeography and habitat availability on species abundance and community composition. Raffles Bulletin of Zoology Supplement 30: 184–202 

Hobbs, J-P.A., Newman, S .J., Mitsopoulos, G.E.A., Travers, M.J., Skepper, C.L., Gilligan, J.J., Allen, G.R., Choat, H.J. & Ayling, A.M. 2014. Fishes of the Cocos (Keeling) Islands: new records, community composition and biogeographic significance. Raffles Bulletin of Zoology Supplement 30: 203–219 

Hoschke, A., Whisson, G. & Moore, G.I. 2019. Complete list of fishes from Rottnest Island. pp. 150-161 in Whisson, G. & Hoschke, A. (eds) The Rottnest Island fish book. 2nd ed. Perth : Aqua Research and Monitoring Services.

Hutchins, B. 2004. Fishes of the Dampier Archipelago, Western Australia. Records of the Western Australian Museum, Supplement 66: 343–398 

Hutchins, J.B. 1994. A survey of the nearshore reef fish fauna of Western Australia's west and south coasts — The Leeuwin Province. Records of the Western Australian Museum, Supplement 46: 1-66 figs 1-6 

Hutchins, J.B. 1997. Checklist of fishes of the Houtman Abrolhos Islands, Western Australia. pp. 239-253 in Wells, F. (ed.) The Marine Fauna and Flora of the Houtman Abrolhos Islands, Western Australia. Perth : Western Australian Museum.

Hutchins, J.B. 2001. Biodiversity of shallow reef fish assemblages in Western Australia using a rapid censusing technique. Records of the Western Australian Museum 20: 247-270

Johnson, J.W. 1999. Annotated checklist of the fishes of Moreton Bay, Queensland, Australia. Memoirs of the Queensland Museum 43(2): 709-762 

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) 

Kramer, M.J., Bellwood, O. & Bellwood, D.R. 2016. Foraging and microhabitat use by crustacean-feeding wrasses on coral reefs. Marine Ecology Progress Series 548: 277-282

Kuiter, R.H. 1993. Coastal Fishes of South-eastern Australia. Bathurst : Crawford House Press 437 pp. 

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. 2010. Labridae fishes: wrasses. Seaford, Victoria, Australia : Aquatic Photographics pp. 398. 

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Moore, G. & Morrison, S. 2009. Fishes of three North West Shelf atolls off Western Australia: Mermaid (Rowley Shoals), Scott and Seringapatam Reefs. Records of the Western Australian Museum, Supplement 77: 221-255 

Moore, G.I., Morrison, S.M., Hutchins, B.J., Allen, G.R. and Sampey, A. 2014. Kimberley marine biota. Historical data: fishes. Records of the Western Australian Museum, Supplement 84: 161-206 

Oxley, W.G., Ayling, A.M., Cheal, A.J. & Osborne, K. 2004. Marine surveys undertaken in the Elizabeth and Middleton Reefs Marine National Nature Reserve, December 2003. Townsville : Australian Institute of Marine Sciences 64 pp. 

Oxley, W.G., Emslie, M., Muir, P. & Thompson, A.A. 2004. Marine surveys undertaken in the Lihou Reef National Nature Reserve, March 2004. Townsville : Australian Institute of Marine Science i-vii, 1-67 pp. 

Randall, J.E., Allen, G.R. & Steene, R. 1990. Fishes of the Great Barrier Reef and Coral Sea. Bathurst : Crawford House Press 507 pp. figs. 

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. 

Shea, S., Liu, M. & Sadovy, Y. 2010. Thalassoma hardwicke. The IUCN Red List of Threatened Species 2010: e.T187559A8567864. https://dx.doi.org/10.2305/IUCN.UK.2010-4.RLTS.T187559A8567864.en. Downloaded on 28 September 2020.

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:37384165

Biology:Hermaphrodite

Conservation:IUCN Least Concern

Depth:0-15 m

Fishing:Aquarium fish

Habitat:Reef associated

Max Size:20 cm TL

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Species Maps

CAAB distribution map