Gambusia affinis
Gambusia affinis
(Western Mosquitofish)
Native Transplant

22 results for Gambusia affinis (Western Mosquitofish)
Download Data

Specimen IDStateCountyLocalityYear HUC Number What's this? Drainage nameStatus
271923 CAHumboldtMad River backwater area downstream of Hwy 1012010 18010102 Mad-Redwoodestablished
272667 CAHumboldtMad River, backwater area on the north side 200 meters west of Highway 101 bridge2010 18010102 Mad-Redwoodestablished
747775 CTNew HavenWest River; New Haven, CT2010 01100004 Quinnipiacestablished
274396 GU Imong River [unspecified location]2010 22010000 Guamunknown
274397 GU Inarajan River [unspecified location]2010 22010000 Guamunknown
274428 GU Pago River [unspecified location]2010 22010000 Guamunknown
274447 GU Talofofo River [unspecified location]2010 22010000 Guamunknown
274380 GU Agaga River [unspecified location]2010 22010000 Guamunknown
747750 GU Agana Spring2010 22010000 Guamestablished
747751 GU Fena Valley Reservoir at boat ramp, NW shoreline opposite spillway2010 22010000 Guamestablished
748292 GU Masso River at Assumption Drive bridge, behind Jose Rios Middle School2010 22010000 Guamestablished
748080 OHFranklinBig Walnut Creek, Big Wallnut Creek2010 05060001 Upper Sciotoestablished
1427908 OHMuskingumLicking River, at Dillon Falls Rd, at Dillon Falls, Falls township2010 05040006 Lickingestablished
1427884 OHMuskingumMuskingum River, at public boat ramp under SR 208 bridge, in Dresden, Dresden township2010 05040004 Muskingumestablished
1427910 OHMuskingumWakatomika Creek, along Narrows Rd 3/4 mile ust SR 60, northwest of Dresden, Cass township2010 05040004 Muskingumestablished
748074 ORBentonDunawi Creek near Corvallis Safeway on Philomath Blvd.2010 17090003 Upper Willametteestablished
269227 PALancasterGrubb Lake in West Hempfield Township2010 02050306 Lower Susquehannaestablished
793708 WIGrant[No specific locality provided]2010 07060003 Grant-Little Maquoketaunknown
793707 WIGrant[No specific locality provided]2010 07060003 Grant-Little Maquoketaunknown
793709 WIGrant[No specific locality provided]2010 07060003 Grant-Little Maquoketaunknown
793710 WIGrant[No specific locality provided]2010 07060003 Grant-Little Maquoketaunknown
793706 WIGreen[No specific locality provided]2010 07090004 Sugarunknown

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.

Data are not available for download from the web site. Please contact NAS staff for a custom query.


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. [2020]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [1/20/2020].

Contact us if you are using data from this site for a publication to make sure the data are being used appropriately and for potential co-authorship if warranted. For queries involving fish, please contact Matthew Neilson. For queries involving invertebrates, contact Amy Benson.