| Specimen ID | 237437 |
| Group | Fishes |
| Genus | Gambusia |
| Species | affinis |
| Common Name | Western Mosquitofish |
| State | PR |
| County | Villalba |
| Locality | Toa Vaca Reservoir on the Toa Vaca River in southern PR, just north of Guyabal |
| Mapping Accuracy | Accurate |
| HUC8 Name | Southern Puerto Rico |
| HUC8 Number | 21010004 |
| HUC10 Name | Rio Matilde to Rio Descalabrado Watersheds |
| HUC10 Number | 2101000403 |
| HUC12 Name | Rio Toa Vaca at Toa Vaca Dam |
| HUC12 Number | 210100040311 |
| Map | |
| Collection Day | 21 |
| Collection Month | 9 |
| Collection Year | 1993 |
| Year Accuracy | Actual |
| Potential Pathway | stocked for biocontrol |
| Status | established |
| Record Type | Specimen |
| Disposal | Smithsonian National Museum of Natural History |
| Museum Cat Number | USNM 384695 |
| Freshwater/Marine | Freshwater |
| Number Preserved | 123 |
