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

22 results for Gambusia affinis (Western Mosquitofish)
Download Data

Specimen IDStateCountyLocalityYear HUC Number What's this? Drainage nameStatus
158242 AZMohaveLake Mead National Recreation Area1999 15010005 Lake Meadestablished
242777 AZSanta CruzSan Rafael Valley1999 15050301 Upper Santa Cruzestablished
158374 CALos AngelesSanta Monica Mountains National Recreation Area1999 18070104 Santa Monica Bayestablished
158301 CASan FranciscoPresidio of San Francisco Park1999 18050002 San Pablo Bayestablished
282399 CASan Joaquinwater diversions and pumping facilities at the Tracy [CA] Fish Collection Facility (USBR)1999 18040003 San Joaquin Deltaestablished
157569 COBentBent's Old Fort National Historic Site1999 11020009 Upper Arkansas-John Martin Reservoircollected
158231 HIHawaiiKaloko-Honokohau National Historic Park1999 20010000 Hawaiicollected
158405 KSChaseTallgrass Prairie National Preserve1999 11070203 Lower Cottonwoodestablished
747810 KSDouglasKansas River below Bowersock Dam at Lawrence1999 10270104 Lower Kansas, Kansasestablished
34923 MABarnstableMashpee, cranberry bog next to tributary near the head of Quashnet River1999 01090002 Cape Codestablished
748031 MABarnstableMashpee, cranberry bog next to tributary near the head of Quashnet River.1999 01090002 Cape Codestablished
34896 MABarnstableQuashnet River on Cape Cod1999 01090002 Cape Codestablished
166832 MT state non-specific1999  stocked
546608 NENemahaMissouri River, Hamburg Bend1999 10240005 Tarkio-Wolfestablished
546828 NEPlattePlatte River, Columbus1999 10200103 Middle Platte-Prairieestablished
546827 NESarpyUnnamed to Western Sarpy Drainage Ditch, se Linoma Beach1999 10200202 Lower Platteestablished
546829 NESaundersPlatte River, Hiway 61999 10200202 Lower Platteestablished
747735 NMCatronNear Alma Bridge1999 15040004 San Franciscoestablished
159326 NVClarkLake Mead National Recreation Area1999 15010005 Lake Meadestablished
157553 UTGrandColorado River at Arches National Park1999 14030005 Upper Colorado-Kane Springsestablished
157903 UTSan JuanColorado River and Green River at Canyonlands National Park1999 14070001 Upper Lake Powellestablished
158052 UTWayneColorado River at Glen Canyon National Recreation Area, Utah and Arizona1999 14070001 Upper Lake Powellestablished

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 [1/22/2026].

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