| Main Ref. | National Register of Lake Surveys, 2006 (Ref. 57534) |
|---|---|
| Name used | Gymnocephalus cernuus |
| Locality | Lake LYGNERN |
| Station | FRI-637886-128777-19810616 |
| Year | 1981 |
| Water depth | 45 m |
| Altitude | 15 m |
| Coordinates | In decimal: 57.49, 12.27 |
| Collector | FINMND13 |
| Identifier | FINMND13 |