| Specimen ID | State | County | Locality | Year | HUC Number | Drainage Name | Status |
| 272865 | NY | Oswego | Lake Ontario at Ninemile Point | 2007 | 04280002 | Lake Ontario | established |
| 238680 | NY | Niagara | Lake Ontario at Olcott | 2007 | 04280002 | Lake Ontario | established |
| 241087 | NY | Oswego | Lake Ontario at Ninemile Point, approximately 7 miles northeast of Oswego | 2007 | 04280002 | Lake Ontario | established |
| 236567 | NY | Oswego | Lake Ontario at Ninemile Point, approximately 7 miles northeast of Oswego | 2006 | 04280002 | Lake Ontario | established |
| 259855 | NY | Oswego | Lake Ontario, Oswego | 2008 | 04280002 | Lake Ontario | 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