| Specimen ID | 159145 |
| Group | Fishes |
| Genus | Gymnocephalus |
| Species | cernua |
| Common Name | Ruffe |
| State | MI |
| County | Ontonagon |
| Locality | Ontonagon River [near mouth] |
| Mapping Accuracy | Accurate |
| HUC8 Name | Ontonagon |
| HUC8 Number | 04020102 |
| HUC10 Name | Ontonagon River |
| HUC10 Number | 0402010204 |
| HUC12 Name | Mill Creek-Ontonagon River |
| HUC12 Number | 040201020409 |
| Map | |
| Collection Day | 7 |
| Collection Month | 5 |
| Collection Year | 2004 |
| Year Accuracy | Actual |
| Potential Pathway | shipping ballast water |
| Status | established |
| Record Type | Personal communication |
| Freshwater/Marine | Freshwater |
| Number Collected | 8 |
| Size | 47 - 179 mm TL |
