| Specimen ID | 1657477 |
| Group | Mollusks-Gastropods |
| Genus | Potamopyrgus |
| Species | antipodarum |
| Common Name | New Zealand mudsnail |
| State | WA |
| County | Snohomish |
| Locality | Steamboat Slough, Snohomish Estuary near Marysville |
| Mapping Accuracy | Accurate |
| HUC8 Name | Snohomish |
| HUC8 Number | 17110011 |
| HUC10 Name | Quilceda Creek-Frontal Possession Sound |
| HUC10 Number | 1711001102 |
| HUC12 Name | Snohomish River-Frontal Possession Sound |
| HUC12 Number | 171100110203 |
| Map | |
| Collection Day | 24 |
| Collection Month | 9 |
| Collection Year | 2018 |
| Year Accuracy | Actual |
| Potential Pathway | hitch hiker | hitch hiker with stocked fish |
| Status | established |
| Record Type | Personal communication |
| Verifier | Edward Johannes |
| Freshwater/Marine | Brackish |
