Western Gregory, Plectroglyphidodon obreptus (Whitley 1948)
A Western Gregory, Stegastes obreptus, at the Abrolhos Islands, Western Australia. Source: Graham Edgar / Reef Life Survey. License: CC by Attribution
Summary:
A brown to almost black damselfish becoming paler below, with a yellowish tinge towards the rear of the body, darker scale margins appearing as narrow oblique bands, fins fading to smoky grey distally, a bright blue anterior margin on the pelvic and anal fins, a black blotch behind a narrow white streak near the front of the dorsal fin, and a bright yellow iris.
This species was previously known as Stegastes obreptus.
This species was previously known as Stegastes obreptus.
Cite this page as:
Bray, D.J. 2021, Plectroglyphidodon obreptus in Fishes of Australia, accessed 05 Apr 2025, https://fishesofaustralia.net.au/home/species/386
Western Gregory, Plectroglyphidodon obreptus (Whitley 1948)
More Info
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Distribution |
Rottnest Island, Western Australia, around the tropical north to Bountiful Island, Queensland. Elsewhere the species occurs in the tropical, east-Indo-west Pacific. Inhabits shallow nearshore rocky and coral reefs often in silty areas. Adults are territorial and "farm" patches of filamentous algae that grow on dead coral. |
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Species Citation |
Pomacentrus obreptus Whitley 1948, Australian Zoologist 11(3): 275. Type locality: Monte Bello Islands, Western Australia. |
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Author |
Bray, D.J. 2021 |
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Resources |
Western Gregory, Plectroglyphidodon obreptus (Whitley 1948)
References
Allen, G.R. 1991. Damselfishes of the World. Melle, Germany : Mergus Verlag 271 pp. (as Stegastes obreptus)
Allen, G.R. 1997. Marine Fishes of Tropical Australia and South-east Asia. Perth : Western Australian Museum 292 pp. 106 pls. (as Stegastes obreptus)
Allen, G. R. 2001. Family Pomacentridae. pp. 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. (as Stegastes obreptus)
Allen, G.R. & Emery, A.R. 1985. A review of the pomacentrid fishes of the genus Stegastes from the Indo-west Pacific with descriptions of two new species. Indo-Pacific Fishes 3: 1-31 figs 1-5 pls 1-3 (as Stegastes obreptus)
Allen, G.R. & Erdmann, M.V. 2012. Reef fishes of the East Indies. Perth : Tropical Reef Research 3 vols, 1260 pp. (as Stegastes obreptus)
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. (as Stegastes obreptus)
Hutchins, B. 2004. Fishes of the Dampier Archipelago, Western Australia. Records of the Western Australian Museum, Supplement 66: 343–398 (as Stegastes obreptus)
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 (as Stegastes obreptus)
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. (as Stegastes obreptus)
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 (as Stegastes obreptus)
Johnson, J.W. & Gill, A.C. 2005. Reef and shore fishes of Sweers Island, Gulf of Carpentaria. Gulf of Carpentaria Scientific Study Report. Geography Monograph Series. Brisbane: Royal Geographic Society of Queensland. pp. 239-260 (as Stegastes obreptus)
Larson, H.K. & Williams, R.S. 1997. Darwin Harbour fishes: a survey and annotated checklist. pp. 339-380 in Hanley, H.R., Caswell, G., Megirian, D. & Larson, H.K. (eds). The Marine Flora and Fauna of Darwin Harbour, Northern Territory, Australia. Proceedings of the Sixth International Marine Biology Workshop. Darwin : Museum and Art Gallery of the Northern Territory 466 pp. (as Stegastes obreptus)
Larson, H.K., Williams, R.S. & Hammer, M.P. 2013. An annotated checklist of the fishes of the Northern Territory, Australia. Zootaxa 3696(1): 1-293 (as Stegastes obreptus)
Tang, K.L., Stiassny, M.L.J., Mayden, R.L. & DeSalle, R. 2021. Systematics of Damselfishes. Ichthyology & Herpetology 109(1): 258-318. https://doi.org/10.1643/i2020105
Whitley, G.P. 1948. New sharks and fishes from Western Australia. Part 4. The Australian Zoologist 11(3): 259-276 figs 1-7 pls 24-25 See ref at BHL
