Gambusia affinis
Gambusia affinis
(Western Mosquitofish)
Fishes
Native Transplant
Collection Info
Point Map
Species Profile
Animated Map

10 results for Gambusia affinis (Western Mosquitofish)
Download Data

Specimen IDStateCountyLocalityYear HUC Number What's this? Drainage nameStatus
165548 AZPimaSanta Cruz River1982 15050301 Upper Santa Cruzestablished
747827 CAImperialSalton Sea 2.0 mi E Bombay Bay on Ca. Rt. 111 (very salty stream)1982 18100204 Salton Seaestablished
30614 CO White River1982 14050002 Lower Yampaestablished
30616 CO San Juan drainage, upper1982 14080102 Piedraestablished
30615 COMesaColorado River just above Gunnison1982 14010005 Colorado Headwaters-Plateauestablished
35706 MN state non-specific1982  established
38523 NM San Juan River, entire length1982 14080101 Upper San Juanestablished
748120 ORWashingtonBeaverton Creek at 170th Ave., tributary to Rock Cr., Tualatin drainage1982 17090010 Tualatinestablished
748299 ORWashingtonFanno Cr. at Bonita Rd., tributary of Tualatin Rover1982 17090010 Tualatinestablished
44854 UTGrandGreen River just above Price River1982 14060005 Lower Green-Desolation Canyoncollected

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 [2/23/2026].

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