| Specimen ID | State | County | Locality | Year | HUC Number | Drainage Name | Status |
| 614024 | WI | Douglas | Brule River at weir N of Brule | 1959 | 04010301 | Beartrap-Nemadji | established |
| 614026 | WI | Douglas | Middle River; Poplar, above barrier, segment 3 | 1997 | 04010301 | Beartrap-Nemadji | established |
| 793679 | WI | Bayfield | Reefer Creek at RM 0 | 1964 | 04010301 | Beartrap-Nemadji | established |
| 793669 | WI | Douglas | Amnicon River at RM 0 | 1964 | 04010301 | Beartrap-Nemadji | established |
| 793690 | WI | Bayfield | North Fish Creek at RM 6.7 | 1976 | 04010301 | Beartrap-Nemadji | established |
| 793695 | WI | Douglas | [No specific locality provided] | 1993 | 04010301 | Beartrap-Nemadji | established |
| 793674 | WI | Bayfield | Fish Creek at RM 0 | 1964 | 04010301 | Beartrap-Nemadji | established |
| 793672 | WI | Bayfield | Cranberry River at RM 0 | 1964 | 04010301 | Beartrap-Nemadji | established |
| 793675 | WI | Douglas | Middle River at RM 0 | 1964 | 04010301 | Beartrap-Nemadji | established |
| 793677 | WI | Douglas | Poplar River at RM 0 | 1964 | 04010301 | Beartrap-Nemadji | established |
| 793680 | WI | Bayfield | Sand River at RM 0 | 1964 | 04010301 | Beartrap-Nemadji | established |
| 793681 | WI | Bayfield | Siskiwit River at RM 0 | 1964 | 04010301 | Beartrap-Nemadji | established |
| 793689 | WI | Bayfield | Red Cliff Creek at RM 0.8 | 1975 | 04010301 | Beartrap-Nemadji | established |
| 793673 | WI | Bayfield | Fish Creek at RM 0 | 1964 | 04010301 | Beartrap-Nemadji | established |
| 793678 | WI | Bayfield | Raspberry River at RM 0 | 1964 | 04010301 | Beartrap-Nemadji | established |
| 793694 | WI | Douglas | Amnicon River at RM 5.7 | 1989 | 04010301 | Beartrap-Nemadji | established |
| 793698 | WI | Douglas | [No specific locality provided] | 2007 | 04010301 | Beartrap-Nemadji | established |
| 849284 | WI | Bayfield | Sioux River at mouth | 2011 | 04010301 | Beartrap-Nemadji | established |
| 793671 | WI | Douglas | Bois Brule River at RM 0 | 1964 | 04010301 | Beartrap-Nemadji | established |
| 793696 | WI | Douglas | Bois Brule River | 1993 | 04010301 | Beartrap-Nemadji | established |
| 1554463 | WI | Douglas | [No locality description provided] | 2010 | 04010301 | Beartrap-Nemadji | established |
| 1877955 | WI | Douglas | Middle River, Lake Superior | 2020 | 04010301 | Beartrap-Nemadji | established |
| 1877956 | WI | Douglas | Brule River, Lake Superior | 2020 | 04010301 | Beartrap-Nemadji | established |
| 1878097 | WI | Douglas | Bois Brule River, Douglas County, WI | 2018 | 04010301 | Beartrap-Nemadji | established |
Citation for this information:
U.S. Geological Survey, 2025,
Petromyzon marinus: U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov, Access Date: 12/15/2025