The gobiid, Acentrogobius pflaumii, was recorded in Cockburn Sound in southwestern Australia in 2004, and is now reported for the first time from the Swan River Estuary ca. 20 km north of the initial collection site. It was observed by SCUBA divers on open, soft/silt substrata and was abundant in areas of the middle Swan River Estuary. Ballast water emissions from a nearby international port, containing eggs and/or fish, are considered the most likely introductory vector. Although the ichthyofauna of the Swan River Estuary has been frequently surveyed, it is difficult to speculate how long A. pflaumii has occurred in southwestern Australia because most surveys have not targeted small, cryptic species. The population increase and spread of A. pflaumii in eastern Australia and New Zealand infer that further range expansions in southwestern Australia are likely.

Baltz, D.M. 1991. Introduced fishes in marine systems and inland seas. Biological Conservation56: 151-177.
Introduced fishes in marine systems and inland seas
Biological Conservation
, vol. 
56
 (pg. 
151
-
177
)
Bird, E.C.F. 1984. Coasts: An Introduction to Coastal Geomorphology. Australian National University Press, Canberra.
Coasts: An Introduction to Coastal Geomorphology
Carlton, J.T. 1985. Transoceanic and interoceanic dispersal of coastal marine organisms: the biology of ballast water. Oceanography and Marine Biology Annual Review23: 313-371.
Transoceanic and interoceanic dispersal of coastal marine organisms: the biology of ballast water
Oceanography and Marine Biology Annual Review
, vol. 
23
 (pg. 
313
-
371
)
Carlton, J.T. and Geller, J.B. 1993. Ecological roulette: the global transport of nonindigenous marine organisms. Science261: 78-82.
Ecological roulette: the global transport of nonindigenous marine organisms
Science
, vol. 
261
 (pg. 
78
-
82
)
Chubb, C.F., Hutchins, J.B., Lenanton, R.C.J. and Potter, I.C. 1979. An annotated checklist of the fishes of the Swan-Avon river system, Western Australia. Records of the Western Australia Museum8: 1-53.
An annotated checklist of the fishes of the Swan-Avon river system, Western Australia
Records of the Western Australia Museum
, vol. 
8
 (pg. 
1
-
53
)
Fowler, H.W. 1961. A synopsis of the fishes of China, part IX: the gobioid fishes. Quarterly Journal of the Taiwan Museum13: 91-280.
A synopsis of the fishes of China, part IX: the gobioid fishes
Quarterly Journal of the Taiwan Museum
, vol. 
13
 (pg. 
91
-
280
)
Francis, M.P., Cameron, W., Morrison, M.A. and Middleton, C. 2003. Invasion of the Asian goby, Acentrogobius pflaumii, into New Zealand, with new locality records of the introduced bridled goby, Arenigobius bifrenatus. New Zealand Journal of Marine and Freshwater Research37: 105-112.
Invasion of the Asian goby, Acentrogobius pflaumii, into New Zealand, with new locality records of the introduced bridled goby, Arenigobius bifrenatus
New Zealand Journal of Marine and Freshwater Research
, vol. 
37
 (pg. 
105
-
112
)
Gaughan, D.J., Neira, F.J., Beckley, L.E. and Potter, I.C. 1990. Composition, seasonality and distribution of the ichthyoplankton in the lower Swan Estuary, southwestern Australia. Australian Journal of Marine and Freshwater Research41: 529-543.
Composition, seasonality and distribution of the ichthyoplankton in the lower Swan Estuary, southwestern Australia
Australian Journal of Marine and Freshwater Research
, vol. 
41
 (pg. 
529
-
543
)
Gill, H.S. and Potter, I.C. 1993. Spatial segregation amongst goby species within an Australian estuary, with a comparison of the diets and salinity tolerance of the two most abundant species. Marine Biology117: 515-526.
Spatial segregation amongst goby species within an Australian estuary, with a comparison of the diets and salinity tolerance of the two most abundant species
Marine Biology
, vol. 
117
 (pg. 
515
-
526
)
Hamer, P., Jenkins, G. and Welsford, D. 1998. Sampling of Newly-Settled Snapper, Pagrus auratus, and Identification of Preferred Habitats in Port Phillip Bay - A Pilot Study. Marine and Freshwater Resources Institute Technical Report, Queenscliff, Victoria, Australia.
Sampling of Newly-Settled Snapper, Pagrus auratus, and Identification of Preferred Habitats in Port Phillip Bay - A Pilot Study
Hayes, K., Sliwa, C., Migus, S., McEnnulty, F. and Dunstan, P 2005. National priority pests - Part II. Ranking of Australian Marine Pests. Department of Environment and Heritage Report, Canberra, Australia.
National priority pests - Part II. Ranking of Australian Marine Pests
Hewitt, C.L., Campbell, M.L., Thresher, R.E., Martin, R.B., Boyd, S., Cohen, B.F., Currie, D.R., Gomon, M.F., Keough, M.J., Lewis, J.A., Lockett, M.M., Mays, N., McArthur, M.A., O'Hara, T.D., Poore, G.C. B., Ross, J., Storey, M. J., Watson, J.E. and Wilson, R.S. 2004. Introduced and cryptogenic species in Port Phillip Bay, Victoria, Australia. Marine Biology144: 183-202.
Introduced and cryptogenic species in Port Phillip Bay, Victoria, Australia
Marine Biology
, vol. 
144
 (pg. 
183
-
202
)
Hoeksema, S.D. and Potter, I.C. 2006. Diel, seasonal, regional and annual variations in the characteristics of the ichthyofauna of the upper reaches of a large Australian microtidal estuary. Estuarine, Coastal and Shelf Science67: 503-520.
Diel, seasonal, regional and annual variations in the characteristics of the ichthyofauna of the upper reaches of a large Australian microtidal estuary
Estuarine, Coastal and Shelf Science
, vol. 
67
 (pg. 
503
-
520
)
Horinouchi, M. and Sano, M. 2001. Effects of changes in seagrass shoot density and leaf height on the abundance of juveniles of Acentrogobius pflaumii in a Zostera marina bed. Ichthyological Research48: 179-185.
Effects of changes in seagrass shoot density and leaf height on the abundance of juveniles of Acentrogobius pflaumii in a Zostera marina bed
Ichthyological Research
, vol. 
48
 (pg. 
179
-
185
)
Hutchins, J.B. and Thompson, M. 1983. The Marine and Estuarine Fishes of South-Western Australia. The Western Australian Museum, Perth, Australia.
The Marine and Estuarine Fishes of South-Western Australia
Johnson, T.B., Allen, M., Corkum, L.D. and Lee, V.A. 2005. Comparison of methods need to estimate population size of round gobies (Neogobius melanosomus) in Western Lake Erie. Journal of Great Lakes Research31: 78-86.
Comparison of methods need to estimate population size of round gobies (Neogobius melanosomus) in Western Lake Erie
Journal of Great Lakes Research
, vol. 
31
 (pg. 
78
-
86
)
Kanou, K., Sano, M. and Hohno, H. 2004. Food habits of fishes on unvegetated tidal mudflats in Tokyo Bay, central Japan. Fisheries Science70: 978-987.
Food habits of fishes on unvegetated tidal mudflats in Tokyo Bay, central Japan
Fisheries Science
, vol. 
70
 (pg. 
978
-
987
)
Lockett, M.M. and Gomon, M.F. 2001. Ship mediated fish invasions in Australia: two new introductions and a consideration of two previous invasions. Biological Invasions3: 187-192.
Ship mediated fish invasions in Australia: two new introductions and a consideration of two previous invasions
Biological Invasions
, vol. 
3
 (pg. 
187
-
192
)
Loneragan, N.R., Potter, I.C. and Lenanton, R.C.J. 1989. Influence of site, season and year on the contributions made by marine, estuarine, diadromous and freshwater species to the fish fauna of a temperate Australian Estuary. Marine Biology103: 461-479.
Influence of site, season and year on the contributions made by marine, estuarine, diadromous and freshwater species to the fish fauna of a temperate Australian Estuary
Marine Biology
, vol. 
103
 (pg. 
461
-
479
)
Masuda, H., Amaoka, K., Araga, C., Uyeno, T. and Yoshino, T. 1984. The fishes of the Japanese Archipelago. Tokai University Press, Tokyo.
The fishes of the Japanese Archipelago
Matsumiya, Y., Murakami, T., Suzuki, T. and Oka, M. 1980. Some ecological observations on gobies, Sagamia geneionema and Rhinogobius pflaumi in Shijiki Bay. Bulletin of the Seikai Regional Fisheries Research Laboratory54: 321-332.
Some ecological observations on gobies, Sagamia geneionema and Rhinogobius pflaumi in Shijiki Bay
Bulletin of the Seikai Regional Fisheries Research Laboratory
, vol. 
54
 (pg. 
321
-
332
)
Mead-Hunter, D. 2005. Another introduced fish species for Western Australian waters. The Western Australian Naturalist24(3): 204.
Another introduced fish species for Western Australian waters
The Western Australian Naturalist
, vol. 
24
 pg. 
204
 
Potter, I.C. and Hyndes, G.A. 1999. Characteristics of the ichthyofaunas of southwestern Australian estuaries, including comparisons with holarctic estuaries elsewhere in temperate Australia: A review. Australian Journal of Ecology24: 395-421.
Characteristics of the ichthyofaunas of southwestern Australian estuaries, including comparisons with holarctic estuaries elsewhere in temperate Australia: A review
Australian Journal of Ecology
, vol. 
24
 (pg. 
395
-
421
)
Ray, W.J. and Corkum, L.D. 2001. Habitat and site affinity of the round goby. Journal of Great Lakes Research27: 329-334.
Habitat and site affinity of the round goby
Journal of Great Lakes Research
, vol. 
27
 (pg. 
329
-
334
)
Sapota, M.R. and Skora, K.E. 2005. Spread of alien (non- indigenous) fish species Neogobius melanstomus in the Gulf of Gdansk (south Baltic). Biological Invasions7: 157-164.
Spread of alien (non- indigenous) fish species Neogobius melanstomus in the Gulf of Gdansk (south Baltic)
Biological Invasions
, vol. 
7
 (pg. 
157
-
164
)
Sutton, C.A. and Bruce, B.D. 1996. Temperature and Salinity Tolerances of the Larvae of the Northern Pacific Seastar Asterias amurensis: Technical Report No. 7. Centre for Research on Introduced Marine Pests (CRIMP), CSIRO, Hobart, Australia.
Temperature and Salinity Tolerances of the Larvae of the Northern Pacific Seastar Asterias amurensis
Wickett, R.G. and Corkum, L.D. 1998. You have to get wet: A case study of the nonindigenous great lakes fish, round goby. Fisheries23: 26-27.
You have to get wet: A case study of the nonindigenous great lakes fish, round goby
Fisheries
, vol. 
23
 (pg. 
26
-
27
)
Wonham, M.J., Carlton, J.T., Ruiz, G.M. and Smith, L.D. 2000. Fish and ships: relating dispersal frequency to success in biological invasions. Marine Biology136: 1111-1121.
Fish and ships: relating dispersal frequency to success in biological invasions
Marine Biology
, vol. 
136
 (pg. 
1111
-
1121
)
This content is only available as a PDF.