Gambusia affinis
Gambusia affinis
(Western Mosquitofish)
Fishes
Native Transplant
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6 results for Gambusia affinis (Western Mosquitofish)
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Specimen IDStateCountyLocalityYear HUC Number What's this? Drainage nameStatus
620945 CASacramentoDelta [general location]1950 18020163 Lower Sacramentoestablished
620946 CASacramentoDelta [general location]1989 18020163 Lower Sacramentoestablished
273911 CASacramentoLily pond at [historic] Sutter's Fort in Sacramento1922 18020163 Lower Sacramentostocked
748012 CASolanoUlatis Creek, 0.9 miles above Lewis Rd.1973 18020163 Lower Sacramentoestablished
747887 CASolanoUlatis Creek, below diversion dam at Marnt Prairie Rd.1973 18020163 Lower Sacramentoestablished
159765 CAYoloYolo Bypass2001 18020163 Lower Sacramentoestablished

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. [2025]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [2/3/2025].

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