| Main Ref. | National Register of Lake Surveys, 2006 (Ref. 57534) |
|---|---|
| Name used | Gymnocephalus cernuus |
| Locality | Lake FRÄCKSJÖN |
| Station | FRI-645289-128665-19990718 |
| Year | 1999 |
| Water depth | 15 m |
| Altitude | 58 m |
| Coordinates | In decimal: 58.15, 12.18 |
| Collector | Freshwater Research Institute |
| Identifier | Freshwater Research Institute |