| Specimen ID | State | County | Locality | Year | HUC Number | Drainage Name | Status |
| 241103 | WI | Milwaukee | Lake Michigan at Bradford Beach, Milwaukee Bay, Milwaukee | 2007 | 04190000 | Lake Michigan | established |
| 241086 | WI | Milwaukee | Lake Michigan at Bradford Beach, Milwaukee Bay, Milwaukee | 2007 | 04190000 | Lake Michigan | established |
| 241102 | WI | Ozaukee | Lake Michigan at Donges Bay, 15 miles north of Milwaukee Harbor, Milwaukee | 2007 | 04190000 | Lake Michigan | established |
| 1421448 | WI | Milwaukee | Milwaukee Harbor, WI | 2016 | 04190000 | Lake Michigan | established |
| 1421446 | WI | Brown | Lower Fox River/Green Bay, WI | 2016 | 04190000 | Lake Michigan | established |
| 1421447 | WI | Milwaukee | Milwaukee Harbor, WI | 2016 | 04190000 | Lake Michigan | established |
| 1421449 | WI | Milwaukee | Milwaukee Harbor, WI | 2016 | 04190000 | Lake Michigan | established |
| 1884264 | WI | Milwaukee | Milwaukee Harbor, Lake Michigan | 2021 | 04190000 | Lake Michigan | established |
| 1884265 | WI | Milwaukee | Milwaukee Harbor, Lake Michigan | 2022 | 04190000 | Lake Michigan | established |
| 1884266 | WI | Milwaukee | Milwaukee Harbor, Lake Michigan | 2022 | 04190000 | Lake Michigan | established |
| 1884267 | WI | Milwaukee | Milwaukee Harbor, Lake Michigan | 2021 | 04190000 | Lake Michigan | established |
Citation for this information:
U.S. Geological Survey, 2025,
Hemimysis anomala: U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov, Access Date: 12/18/2025