| Specimen ID | 160240 |
| Group | Fishes |
| Genus | Gymnocephalus |
| Species | cernua |
| Common Name | Ruffe |
| State | MI |
| County | Delta |
| Locality | Lake Michigan, in Big Bay de Noc |
| Mapping Accuracy | Accurate |
| HUC8 Name | Lake Michigan |
| HUC8 Number | 04190000 |
| HUC10 Name | Lake Michigan |
| HUC10 Number | 0419000002 |
| HUC12 Name | Lake Michigan |
| HUC12 Number | 041900000200 |
| Map | |
| Collection Day | 8 |
| Collection Month | 9 |
| Collection Year | 2004 |
| Year Accuracy | Actual |
| Potential Pathway | shipping ballast water |
| Status | established |
| Comments | Female specimen with eggs. |
| Record Type | Personal communication |
| Earliest Record | locale |
| Freshwater/Marine | Freshwater |
| Number Collected | 1 |
| Size | 4.3 inches |
| Number of Breeding Females | 1 |
