| Specimen ID | State | County | Locality | Year | HUC Number | Drainage Name | Status |
| 42164 | PA | Erie | Lake Erie | 1968 | 04260000 | Lake Erie | established |
| 41956 | PA | Erie | Lake Erie | 1985 | 04260000 | Lake Erie | established |
| 42016 | PA | Erie | Lake Erie | 1935 | 04260000 | Lake Erie | established |
| 557920 | PA | Erie | Presque Isle Bay | 1991 | 04260000 | Lake Erie | established |
| 557924 | PA | Erie | Presque Isle Bay | 1987 | 04260000 | Lake Erie | established |
| 557925 | PA | Erie | Presque Isle Bay | 1986 | 04260000 | Lake Erie | established |
| 557930 | PA | Erie | Presque Isle Bay | 1982 | 04260000 | Lake Erie | established |
| 557933 | PA | Erie | Presque Isle Bay | 1982 | 04260000 | Lake Erie | established |
| 557936 | PA | Erie | Presque Isle Bay | 1982 | 04260000 | Lake Erie | established |
| 557937 | PA | Erie | Presque Isle Bay | 1982 | 04260000 | Lake Erie | established |
| 557926 | PA | Erie | Presque Isle Bay | 1982 | 04260000 | Lake Erie | established |
| 557928 | PA | Erie | Presque Isle Bay | 1982 | 04260000 | Lake Erie | established |
| 557931 | PA | Erie | Presque Isle Bay | 1982 | 04260000 | Lake Erie | established |
| 557932 | PA | Erie | Presque Isle Bay | 1982 | 04260000 | Lake Erie | established |
| 557934 | PA | Erie | Presque Isle Bay | 1982 | 04260000 | Lake Erie | established |
| 557935 | PA | Erie | Presque Isle Bay | 1982 | 04260000 | Lake Erie | established |
| 557938 | PA | Erie | Presque Isle Bay | 1982 | 04260000 | Lake Erie | established |
| 557927 | PA | Erie | Presque Isle Bay | 1982 | 04260000 | Lake Erie | established |
| 557929 | PA | Erie | Presque Isle Bay | 1982 | 04260000 | Lake Erie | established |
| 557918 | PA | Erie | Presque Isle Bay | 1997 | 04260000 | Lake Erie | established |
| 557919 | PA | Erie | Presque Isle Bay | 1997 | 04260000 | Lake Erie | established |
| 557921 | PA | Erie | Presque Isle Bay | 1987 | 04260000 | Lake Erie | established |
| 557922 | PA | Erie | Presque Isle Bay | 1987 | 04260000 | Lake Erie | established |
| 557923 | PA | Erie | Presque Isle Bay | 1987 | 04260000 | Lake Erie | established |
| 1788176 | PA | Erie | Lake Erie,Lake Erie (ERIE) | 2006 | 04260000 | Lake Erie | |
| 1884286 | PA | Erie | Presque Isle Bay, Lake Erie | 2017 | 04260000 | Lake Erie | established |
| 1907697 | PA | Erie | Lake Erie, at Erie, PA | 2017 | 04260000 | Lake Erie | |
| 1909040 | PA | Erie | Lake Erie, at Erie, PA | 2017 | 04260000 | Lake Erie | |
| 1909020 | PA | Erie | Lake Erie, at Erie, PA | 2014 | 04260000 | Lake Erie | |
| 1909028 | PA | Erie | Lake Erie, at Erie, PA | 2015 | 04260000 | Lake Erie | |
| 1909029 | PA | Erie | Lake Erie, at Erie, PA | 2015 | 04260000 | Lake Erie | |
| 1909052 | PA | Erie | Lake Erie, at Erie, PA | 2018 | 04260000 | Lake Erie | |
| 1909021 | PA | Erie | Lake Erie, at Erie, PA | 2014 | 04260000 | Lake Erie | |
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