Gambusia affinis
Gambusia affinis
(Western Mosquitofish)
Fishes
Native Transplant
Collection Info
Point Map
Species Profile
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18 results for Gambusia affinis (Western Mosquitofish)
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Specimen IDStateCountyLocalityYear HUC Number What's this? Drainage nameStatus
1893042 CAHumboldt[No locality description provided]2025 18010102 Mad-Redwood 
1891774 CALos Angeles[No locality description provided; coordinates obscured by collector]2025 18070106 San Gabriel 
1890448 CAMarin[No locality description provided]2025 18050002 San Pablo Bay 
1891994 CAMonterey[No locality description provided]2025 18060005 Salinas 
1891751 CASan Diego[No locality description provided]2025 18070304 San Diego 
1893112 CASanta Barbara[No locality description provided]2025 18060013 Santa Barbara Coastal 
1892074 CASanta Clara[No locality description provided]2025 18050004 San Francisco Bay 
1895108 HIHonolulu[No locality description provided; coordinates obscured by collector]2025 20060000 Oahu 
1892480 KSBarber[No locality description provided]2025 11060003 Medicine Lodge 
1890080 KSJohnson[No locality description provided]2025 10270104 Lower Kansas, Kansas 
1892697 MIAllegan[No locality description provided]2025 04050002 Black-Macatawa 
1892698 MIAllegan[No locality description provided]2025 04050002 Black-Macatawa 
1876408 OKWashington[No locality description provided]2025 11070106 Caney 
1876409 OKWashington[No locality description provided]2025 11070106 Caney 
1886694 PACrawfordPymatuning Lake, at Linesville boat ramp2025 05030102 Shenangoestablished
1895275 UTJuab[No locality description provided]2025 16020201 Utah Lake 
1895278 UTJuab[No locality description provided]2025 16020201 Utah Lake 
1895280 UTJuab[No locality description provided]2025 16020201 Utah Lake 

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. [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.