Gambusia affinis
Gambusia affinis
(Western Mosquitofish)
Fishes
Native Transplant
Collection Info
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Species Profile
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20 results for Gambusia affinis (Western Mosquitofish)
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Specimen IDStateCountyLocalityYear HUC Number What's this? Drainage nameStatus
33554 IL northern Illinois1961 07120007 Lower Foxestablished
33080 IL Mississippi River, Pool 191979 07080104 Flint-Hendersonestablished
242397 IL state non-specific1979  established
1322683 ILBureauGreen1979 07090007 Greenestablished
160050 ILCookWinnetka, IL1923 07120003 Chicagoestablished
242398 ILCookWinnetka, IL1925 07120003 Chicagoestablished
748088 ILKaneFox River @ R.M. 60 dst St. Charles dam ust St. Charles WWTP2008 07120007 Lower Foxestablished
747752 ILKaneFox River just Southeast of intersection of Randall Road and Fabyan Parkway in Batavia2000 07120007 Lower Foxestablished
748079 ILKendallFox River @ R.M. 38.0 ust of Yorkville Illinois Dam2008 07120007 Lower Foxestablished
1542538 ILWillBackwater area, right descending wall upstream of Cargill boat launch2017 07120004 Des Plainesestablished
1543287 ILWillDownstream of Beartrap controlling works2017 07120004 Des Plainesestablished
1542539 ILWillDownstream of electric barrier2017 07120004 Des Plainesestablished
1543288 ILWillDownstream of electric barrier2017 07120004 Des Plainesestablished
1542164 ILWillDownstream of electric barrier2017 07120004 Des Plainesestablished
1542913 ILWillHanson Material services loading slip and powerplant outfall2017 07120004 Des Plainesestablished
1542537 ILWillRight descending wall downstream of dispersal barrier2016 07120004 Des Plainesestablished
1542912 ILWillRight descending wall downstream of dispersal barrier2017 07120004 Des Plainesestablished
1542163 ILWillRight descending wall, downstream of Cargill boat ramp2016 07120004 Des Plainesestablished
1543286 ILWillRight descending wall, downstream of Cargill boat ramp2017 07120004 Des Plainesestablished
1542165 ILWillRight descending wall, downstream of Cargill boat ramp2017 07120004 Des Plainesestablished

Data Disclaimer: Number of records does not imply species abundance. This summary represent collection records only and may not reflect the actual distribution of established populations. These data are preliminary or provisional and are subject to revision. They are being provided to meet the need for timely best science. The data have not received final approval by the U.S. Geological Survey (USGS) and are provided on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from the authorized or unauthorized use of the data.

Disclaimer:

The data represented on this site vary in accuracy, scale, completeness, extent of coverage and origin. It is the user's responsibility to use these data consistent with their intended purpose and within stated limitations. We highly recommend reviewing metadata files prior to interpreting these data.

Citation information: U.S. Geological Survey. [2025]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [1/29/2025].

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For general information and questions about the database, contact Wesley Daniel. For problems and technical issues, contact Matthew Neilson.