Gambusia affinis
Gambusia affinis
(Western Mosquitofish)
Fishes
Native Transplant
Collection Info
Point Map
Species Profile
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12 results for Gambusia affinis (Western Mosquitofish)
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Specimen IDStateCountyLocalityYear HUC Number What's this? Drainage nameStatus
748118 CARiversideSandia Creek, from Martin Fleming Ranch entrance upstream1998 18070302 Santa Margaritaestablished
30829 CO Arkansas drainage1998 11020002 Upper Arkansasestablished
30828 CO South Platte (HUC6) non-specific1998 10190000 South Platteestablished
747858 KYBooneBig Bone Lick Park, PAR ust confluence Ohio River (RM 516.6)1998 05090203 Middle Ohio-Laugheryestablished
159812 NE Platte drainage1998 10200100 Middle Platteestablished
37443 NE Republican (HUC6) non-specific1998 10250000 Republicanestablished
546767 NENemahaMissouri River, Hamburg Bend chute1998 10240005 Tarkio-Wolfestablished
546826 NEOtoeMissouri River, Hamburg Bend Mitigation Site1998 10240001 Keg-Weeping Waterestablished
39067 NVNyeAsh Meadows National Wildlife Refuge, several springs1998 18090202 Upper Amargosaestablished
747851 OHSciotoOhio River at Shawnee Center Ramp1998 05090201 Ohio Brush-Whiteoakestablished
748231 ORDouglasUMPQUA R. ELK CR. UNDER HAYHURST BR.1998 17100303 Umpquaestablished
46889 WV upper Potomac1998 02070000 Potomaccollected

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.

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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. [2026]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [2/21/2026].

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