| Specimen ID | 159147 |
| Group | Fishes |
| Genus | Gymnocephalus |
| Species | cernua |
| Common Name | Ruffe |
| State | MI |
| County | Houghton |
| Locality | Keweenaw Waterway (South Entry - Portage Lake) [S of Houghton, MI] |
| Mapping Accuracy | Accurate |
| HUC8 Name | Keweenaw Peninsula |
| HUC8 Number | 04020103 |
| HUC10 Name | Portage Lake |
| HUC10 Number | 0402010303 |
| HUC12 Name | Portage Lake-Portage River |
| HUC12 Number | 040201030307 |
| Map | |
| Collection Day | 9 |
| Collection Month | 5 |
| Collection Year | 2004 |
| Year Accuracy | Actual |
| Potential Pathway | shipping ballast water |
| Status | established |
| Record Type | Personal communication |
| Earliest Record | locale |
| Freshwater/Marine | Freshwater |
| Number Collected | 2 |
| Size | 78 mm, 79 mmTL |
