Gambusia affinis
Gambusia affinis
(Western Mosquitofish)
Native Transplant

18 results for Gambusia affinis (Western Mosquitofish)
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Specimen IDStateCountyLocalityYear HUC Number What's this? Drainage nameStatus
274339 GU Agfayan River [unspecified location within drainage]2008 22010000 Guamunknown
274386 GU Geus River [unspecified location]2006 22010000 Guamunknown
274396 GU Imong River [unspecified location]2010 22010000 Guamunknown
274397 GU Inarajan River [unspecified location]2010 22010000 Guamunknown
274414 GU Masso River [unspecified location]2004 22010000 Guamunknown
274428 GU Pago River [unspecified location]2010 22010000 Guamunknown
274432 GU Sadog Gago River [unspecified location]2004 22010000 Guamunknown
274442 GU small river on Mt. Santa Rosa2005 22010000 Guamunknown
274447 GU Talofofo River [unspecified location]2010 22010000 Guamunknown
274462 GU Ugum River [unspecified location]2005 22010000 Guamunknown
274380 GU Agaga River [unspecified location]2010 22010000 Guamunknown
747750 GU Agana Spring2010 22010000 Guamestablished
274341 GU Ajayan River [unspecified location within system]2005 22010000 Guamunknown
274348 GU Almagosa drainage [unspecified location within drainage]2004 22010000 Guamunknown
274358 GU Atantano River2006 22010000 Guamunknown
274370 GU Chaot River [unspecified location]2004 22010000 Guamunknown
747751 GU Fena Valley Reservoir at boat ramp, NW shoreline opposite spillway2010 22010000 Guamestablished
748292 GU Masso River at Assumption Drive bridge, behind Jose Rios Middle School2010 22010000 Guamestablished

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 [6/21/2024].

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