Gambusia affinis
Gambusia affinis
(Western Mosquitofish)
Native Transplant

27 results for Gambusia affinis (Western Mosquitofish)
Download Data

Specimen IDStateCountyLocalityYear HUC Number What's this? Drainage nameStatus
748130 CAOrangeAliso Prkway, Aliso Creek1975 18070301 Aliso-San Onofreestablished
747713 CAOrangeCrown Valley Parkway, Salt Creek1975 18070301 Aliso-San Onofreestablished
747813 CAOrangemouth of Aliso Creek at Hwy 1, 4.5 mi S of Laguna1973 18070301 Aliso-San Onofreestablished
747814 CAOrangemouth of Aliso Creek to Horshoe Bend1976 18070301 Aliso-San Onofreestablished
748151 CAOrangemouth of Laguna Canyon just south of Laguna Aliso Creek1973 18070301 Aliso-San Onofreestablished
747712 CAOrangeOso Creek near Avery Parkway1975 18070301 Aliso-San Onofreestablished
748058 CAOrangeSan Juan Creek 3 miles below lower San Juan Station1975 18070301 Aliso-San Onofreestablished
748150 CAOrangeSan Juan Creek at mouth 1.0-1.5 miles west of Dana Point, 1mile southwest of Capistrano beach1973 18070301 Aliso-San Onofreestablished
748046 CAOrangeSan Juan Creek near lower San Juan Station - resurvey1975 18070301 Aliso-San Onofreestablished
748053 CAOrangeSan Juan Creek, 50 yds below xing of Ortega Hwy bridge1975 18070301 Aliso-San Onofreestablished
748123 CAOrangeSan Juan Creek, near San Juan Summer home1975 18070301 Aliso-San Onofreestablished
748118 CARiversideSandia Creek, from Martin Fleming Ranch entrance upstream1998 18070302 Santa Margaritaestablished
747714 CASan DiegoBuena Vista Creek., just off of Camino Real paralleling hwy. 781975 18070303 San Luis Rey-Escondidoestablished
747967 CASan DiegoDe Luz Creek Trib. Township: San Diego. Maps: 250k-Santa Ana, 24k-Fallbrook, 100k-Oceanside.2001 18070302 Santa Margaritaestablished
747949 CASan DiegoEscondido Creek. Maps: 250k - Santa Ana; 24k - Rancho Santa Fe; 100k - Oceanside.2002 18070303 San Luis Rey-Escondidoestablished
748236 CASan DiegoLas Pulgas Cr., on camp Pendleton, about 13 km. NW oceanside.1976 18070301 Aliso-San Onofreestablished
747711 CASan DiegoNear Oceanside Municipal Airport, San Luis R.1975 18070303 San Luis Rey-Escondidoestablished
748147 CASan DiegoSan Diego 6. south shore of Buena Vista Lagoon on north edge of Carlsbad, collected at Jefferson Blvd. at inlet to lagoon, about halfway between here and 605 freeway, and at Hill Street crossing1975 18070303 San Luis Rey-Escondidoestablished
747992 CASan DiegoSan Diego R. just above and below upper limit of tidewater and Interstate 405.1973 18070304 San Diegoestablished
748043 CASan DiegoSan Diego River between Old Mission SD and Interstate 151975 18070304 San Diegoestablished
748042 CASan DiegoSan Dieguito at Vida de Santa Fe Road1975 18070304 San Diegoestablished
748235 CASan DiegoSan Mateo (or San Diego) Creek on N. edge Camp Pendleton1974 18070301 Aliso-San Onofreestablished
748234 CASan DiegoSan Onofre Creek at San Onofre (on camp Pendleton, US Marine Corps Base)1974 18070301 Aliso-San Onofreestablished
748066 CASan DiegoSanta Margarita River at Camp Pendleton Hospital1975 18070302 Santa Margaritaestablished
747710 CASan DiegoSanta Margarita River, Temecula Gorge1975 18070302 Santa Margaritaestablished

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. [2021]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [4/15/2021].

Contact us if you are using data from this site for a publication to make sure the data are being used appropriately and for potential co-authorship if warranted. For queries involving fish, please contact Matthew Neilson. For queries involving invertebrates, contact Amy Benson.