Gambusia affinis
Gambusia affinis
(Western Mosquitofish)
Native Transplant

24 results for Gambusia affinis (Western Mosquitofish)
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Specimen IDStateCountyLocalityYear HUC Number What's this? Drainage nameStatus
30465 CO Arkansas drainage1993 11020002 Upper Arkansasestablished
30829 CO Arkansas drainage1998 11020002 Upper Arkansasestablished
30693 CO Big Thompson drainage1997 10190006 Big Thompsonestablished
30694 CO Cache La Poudre drainage1997 10190007 Cache La Poudreestablished
30464 CO Colorado drainage1993 14010001 Colorado Headwatersestablished
30691 CO middle South Platte-Cherry Creek drainage1997 10190003 Middle South Platte-Cherry Creekestablished
30467 CO Platte drainage1993 10190000 South Platteestablished
30466 CO Rio Grande drainage1993 13010001 Rio Grande Headwatersestablished
30289 CO San Luis Valley (Rio Grande headwaters drainage)1986 13010003 San Luisestablished
30828 CO South Platte (HUC6) non-specific1998 10190000 South Platteestablished
30692 CO St. Vrain drainage1997 10190005 St. Vrainestablished
30614 CO White River1982 14050002 Lower Yampaestablished
30616 CO San Juan drainage, upper1982 14080102 Piedraestablished
747953 COAdamsSouth Platte.2002 10190003 Middle South Platte-Cherry Creekestablished
1322686 COBacaUpper Cimarron1967 11040002 Upper Cimarronestablished
157569 COBentBent's Old Fort National Historic Site1999 11020009 Upper Arkansas-John Martin Reservoircollected
30193 CODenverDenver County1985 10190000 South Plattecollected
30196 COEl PasoEl Paso County1985 Unknown or N/Acollected
30192 COLa PlataLa Plata County1985 14080101 Upper San Juancollected
30615 COMesaColorado River just above Gunnison1982 14010005 Colorado Headwaters-Plateauestablished
30191 COMesaMesa County1985 14000000 Upper Coloradocollected
282620 COOteroArkansas River and Arch Wetland near Historic Fort Bent ruins2005 11020005 Upper Arkansas-Lake Meredithcollected
30197 COPuebloPueblo County1985 11020002 Upper Arkansascollected
30194 CORio GrandeRio Grande County1985 13010001 Rio Grande Headwaterscollected

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.


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. [2024]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [3/4/2024].

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