| Specimen ID | State | County | Locality | Year | HUC Number | Drainage Name | Status |
| 39601 | NY | | Finger Lakes | 1980 | 04140201 | Seneca | established |
| 1758525 | NY | Ontario | Canandaigua Lake | 1917 | 04140201 | Seneca | |
| 1758526 | NY | Ontario | Canandaigua Lake | 1925 | 04140201 | Seneca | |
| 1758527 | NY | Ontario | Canandaigua Lake | 1928 | 04140201 | Seneca | |
| 1758528 | NY | | Cayuga Lake | 1919 | 04140201 | Seneca | |
| 1758529 | NY | | Cayuga Lake | 1920 | 04140201 | Seneca | |
| 1758530 | NY | Cayuga | Owasco Lake | 1918 | 04140201 | Seneca | |
| 1758531 | NY | Cayuga | Owasco Lake | 1924 | 04140201 | Seneca | |
| 1758532 | NY | Cayuga | Owasco Lake | 1925 | 04140201 | Seneca | |
| 1758533 | NY | Cayuga | Owasco Lake | 1927 | 04140201 | Seneca | |
| 1758534 | NY | Onondaga | Skaneateles Lake | 1924 | 04140201 | Seneca | |
| 1758535 | NY | Onondaga | Skaneateles Lake | 1927 | 04140201 | Seneca | |
| 613776 | NY | Tompkins | [No locality string in original GBIF record] | 1976 | 04140201 | Seneca | established |
| 613775 | NY | Tompkins | Salmon Creek at Myers on Cayuga Lake. | 1950 | 04140201 | Seneca | established |
| 613777 | NY | Tompkins | [No locality string in original GBIF record] | 1946 | 04140201 | Seneca | established |
| 875618 | NY | Cayuga | Cross Lake at sampling station F15G | 1994 | 04140201 | Seneca | established |
| 875671 | NY | Cayuga | Cross Lake at sampling station F10G | 1994 | 04140201 | Seneca | established |
| 875668 | NY | Cayuga | Cross Lake at sampling station F14G | 1994 | 04140201 | Seneca | established |
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