| Specimen ID | State | County | Locality | Year | HUC Number | Drainage Name | Status |
| 35457 | MI | | Lake St. Clair | 1932 | 04090002 | Lake St. Clair | established |
| 1702150 | MI | Macomb | Lake St. Clair | 2000 | 04090002 | Lake St. Clair | established |
| 1459517 | MI | Macomb | Lake St. Clair, Anchor Bay, New Baltimore | 1994 | 04090002 | Lake St. Clair | established |
| 1460354 | MI | Macomb | Lake St. Clair | 2017 | 04090002 | Lake St. Clair | established |
| 1918260 | MI | St. Clair | Lake Erie, at Lake St. Clair, MI/ON | 2023 | 04090002 | Lake St. Clair | |
| 1918946 | MI | St. Clair | Lake Erie, at St. Clair River, MI/ON | 2023 | 04090002 | Lake St. Clair | |
| 1920075 | MI | St. Clair | Lake Erie, at Lake St. Clair, MI/ON | 2024 | 04090002 | Lake St. Clair | |
| 1920076 | MI | St. Clair | Lake Erie, at Lake St. Clair, MI/ON | 2024 | 04090002 | Lake St. Clair | |
| 1921008 | MI | St. Clair | Lake Erie, at St. Clair River, MI/ON | 2024 | 04090002 | Lake St. Clair | |
Citation for this information:
U.S. Geological Survey, 2026,
Osmerus mordax: U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov, Access Date: 6/4/2026