Gambusia affinis
Gambusia affinis
(Western Mosquitofish)
Fishes
Native Transplant
Collection Info
Point Map
Species Profile
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32 results for Gambusia affinis (Western Mosquitofish)
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Page:12
Specimen IDStateCountyLocalityYear HUC Number What's this? Drainage nameStatus
282196 CA Santa Clara drainage1975 18070102 Santa Claraestablished
29496 CA upper portions of the Santa Clara River system1977 18070102 Santa Claraestablished
28978 CA South California drainage1976 18070102 Santa Claraestablished
747732 CALos AngelesCastaic Creek at Highway 126.1972 18070102 Santa Claraestablished
748054 CALos AngelesHasley Canyon Creek, dirt road north of 126 (approximately 1 miles east from) Interstate 51975 18070102 Santa Claraestablished
747728 CALos AngelesSanta Clara R. (Soledad Guard Station) 103.7 km from mouth.1974 18070102 Santa Claraestablished
747718 CALos AngelesSanta Clara R. 105.3 km from mouth.1974 18070102 Santa Claraestablished
747723 CALos AngelesSanta Clara R. 60.4 km from mouth.1974 18070102 Santa Claraestablished
747727 CALos AngelesSanta Clara R. 98.1 km from mouth.1974 18070102 Santa Claraestablished
747991 CALos AngelesSanta Clara R. in Soledad Canyon Co. 9 mi. downstream of Acton, 0-0.5 mi. upstream of Soledad Ranger Station, T:4N, R: 14W, Sec. 11.1972 18070102 Santa Claraestablished
747724 CALos AngelesSanta Clara R., 71.75km from mouth.1974 18070102 Santa Claraestablished
747726 CALos AngelesSanta Clara R., 97.6 km from mouth.1974 18070102 Santa Claraestablished
747719 CALos AngelesSanta Clara R., Cypress Park, 108.2 km from mouth.1974 18070102 Santa Claraestablished
747725 CALos AngelesSanta Clara R.74.5km from mouth.1974 18070102 Santa Claraestablished
747774 CALos AngelesSanta Clara River at Interstate 5.2003 18070102 Santa Claraestablished
747937 CALos AngelesSanta Clara River, Soledad Canyon, E. of Lang1967 18070102 Santa Claraestablished
282197 CAVenturaLake Piru1975 18070102 Santa Claraestablished
747722 CAVenturaPiru Creek 3.5 km from confluence with Santa Clara River.1974 18070102 Santa Claraestablished
747721 CAVenturaPiru Creek, 2.0 km from confluence with Santa Clara River1974 18070102 Santa Claraestablished
748044 CAVenturaPiru Creek, near Warring Park, Bridge 4371975 18070102 Santa Claraestablished
747968 CAVenturaSanta Clara R. 23.3 km from mouth.1974 18070102 Santa Claraestablished
747988 CAVenturaSanta Clara R. 900-1100 meters from mouth on Pacific Ocean, at Harbor Blvd.1974 18070102 Santa Claraestablished
747990 CAVenturaSanta Clara R., 14.2 km from mouth.1974 18070102 Santa Claraestablished
747971 CAVenturaSanta Clara R., 18.0 km from mouth.1974 18070102 Santa Claraestablished
747989 CAVenturaSanta Clara R., 3.85km from mouth. Oxnard map.1974 18070102 Santa Claraestablished
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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.