Bluespot Goby, Pseudogobius olorum (Sauvage 1880)


Other Names: Blue-spot Goby, Blue-spotted Goby, Galway's Goby, Southern Goby, Swan River Goby

A male Bluespot Goby, Pseudogobius olorum, from Western Australia. Source: Rudie H. Kuiter / Aquatic Photographics. License: All rights reserved

Summary:
Although there is currently a single described species of Pseudogobius from southern Australia, genetic studies indicate that P. olorum occurs from the Gulf St Vincent, South Australia, to Horrocks, Western Australia - and that there are two undescribed species in the south, one from SA to eastern Vic, and a second from eastern VIC to SE Qld.

Cite this page as:
Martin F. Gomon, Pseudogobius olorum in Fishes of Australia, accessed 18 Oct 2018, http://fishesofaustralia.net.au/Home/species/151

Bluespot Goby, Pseudogobius olorum (Sauvage 1880)

More Info


Distribution

Pseudogobius olorum is confined to southern Australia from Gulf St Vincent, SA (138°28'E) to Horrocks, WA (28°25'S), a temperate benthic species in freshwater rivers and ponds and brackish estuaries with muddy, rocky or weedy bottoms.

Features

Dorsal fin VI + I, 7 9; A I, 7 8; C (segmented) 16; P. 14 17; V. I, 5; Vert 10 + 15-17
Body slender. Head of moderate size 3.3-4.0 in SL. Snout rounded in side view, extending forward before anterior tip of jaws. Cheeks bulbose. Interorbital narrow, about half eye diameter or less. Mouth small, almost horizontal, reaching to below middle of eyes; lips thin to almost absent; tongue tip truncate. Pore above front of each eye, one behind upper quarter of each eye, and one behind middle of each eye; no fine villi on head; no preopercular pores.
Body scales ctenoid, lateral line absent; longitudinal series 26 32; operculum covered with cycloid scales, cheeks with few or no scales; top of head scaled to behind eyes, predorsal scales 7–10, usually with large scale close behind eyes; pectoral fin bases and area before ventral fins scaled.
Two dorsal fins, first low with rounded margin, originating above and just behind ventral fin insertions; second dorsal origin just behind first dorsal fin; anal fin origin below and just behind second dorsal origin. Caudal fin with rounded margin. Pectoral fins large, with rounded margin. Ventral fins fused to form cup shaped disc, originating below pectoral fin insertions.

Size

To around 6 cm.

Colour

Pale brown to grey, paler below; scales on body and top of head often outlined in darker brown; head often with bars radiating from lower part of eyes; broad brown stripe above upper lip; body with four or five brown blotches along back; midsides with 5-6 irregularly shaped blotches; rear of caudal peduncle with enlarged brown spot, often with spot above and behind and similar spot behind and below on caudal fin base; body sometimes with faint brown spots forming irregular longitudinal lines. First dorsal fin with 2-3 grey oblique bars, and black or blue spot near base and end of fin; second dorsal fin with small spots forming oblique rows ventrally on fin; anal fin grey to clear, often with blue outer margin; caudal fin with spots forming wavy vertical bands on upper two thirds of fin; lower third of fin grey; pectoral and ventral fins grey to clear.

Feeding

Generally carnivorous, with diet including crustaceans, such as amphipods and ostracods.

Biology

Oviparous, benthic spawners during spring in the upper reaches of estuaries with plentiful vegetation and salinity of less than 30%.

Remarks

Records of this species from eastern Australia are based on other species.

Species Citation

Gobius olorum Sauvage 1880, Bull. Soc. Philomath. Paris (7)4: 43. Type locality: Swan River, WA.

Author

Martin F. Gomon

Resources

Australian Faunal Directory

Bluespot Goby, Pseudogobius olorum (Sauvage 1880)

References


Allen, G.R. 1989. Freshwater Fishes of Australia. Neptune, New Jersey : T.F.H. Publications 240 pp., 63 pls. 

Allen, G.R., Midgley, S.H. & Allen, M. 2002. Field Guide to the Freshwater Fishes of Australia. Perth : Western Australian Museum 394 pp.

Hoese, D.F. & Larson, H.K. 1980. Family Gobiidae: gobies. pp. 186-192 6 figs in McDowall, R.M. (ed.) Freshwater Fishes of South-eastern Australia. Sydney : A.H. & A.W. Reed 208 pp., figs, 32 pls. 

Hoese, D.F. & Larson, H.K. 1994. Family Gobiidae. pp. 781-810, figs 690-714 in Gomon, M.F., Glover, C.J.M. & Kuiter, R.H. (eds) The Fishes of Australia's South Coast. Adelaide : State Printer 992 pp. 810 figs. 

Hoese, D.F. & Larson, H.K. 2008. Family Gobiidae. pp. 749-773 in Gomon, M.F., Bray, D.J. & Kuiter, R.H. (eds) Fishes of Australia's Southern Coast. Sydney : Reed New Holland 928 pp. 

Lake, J.S. 1971. Freshwater Fishes and Rivers of Australia. Melbourne : Nelson 61 pp. (as Lizagobius olorum)

Larson, H.K. & Hoese, D.F. 1996. Family Gobiidae, subfamilies Gobiinae and Gobionellinae. pp. 220-228 in McDowall, R.M. (ed.) Freshwater Fishes of South-eastern Australia. Sydney : Reed Books 247 pp.

McCulloch, A.R. & Waite, E.R. 1918. Some new and little known fishes from South Australia. Records of the South Australian Museum 1(1): 39-78 figs 26-31 pls 2-7 (as Mugilogobius galwayi)

Merrick, J.R. & Schmida, G.E. 1984. Australian Freshwater Fishes Biology and Management. Sydney : J.R. Merrick 409 pp. figs 280 col. figs.

Morgan, D.L., Gill, H.S. & Potter, I.C. 1998. Distribution, identification and biology of freshwater fishes in south-western Australia. Records of the Western Australian Museum, Supplement 56: 1-97.

Morgan, D.L. & Gill, H.S. 2000. Fish associations within the different inland habitats of lower south-western Australia. Records of the Western Australian Museum 20: 31-37

Sauvage, H.E. 1880. Description des gobioides nouveaux ou peu connus de la collection du Muséum d'Histoire Naturelle. Bulletin de la Société Philomathique de Paris 7 4: 40-58.

Scott, T.D., Glover, C.J.M. & Southcott, R.V. 1974. The Marine and Freshwater Fishes of South Australia. Adelaide : Government Printer 392 pp. figs

Whitley, G.P. 1933. Studies in Ichthyology No. 7. Records of the Australian Museum 19(1): 60-112 figs 1-4 pls 11-15 (as Ellogobius (Lizagobius) galwayi)

Quick Facts


CAAB Code:37428009

Habitat:Estuarine, freshwater

Max Size:6 cm

Native:Endemic

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