Family: Niøyefamilien (Petromyzonidae)
| Site | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. | |
|---|---|---|---|---|---|---|
| Ledengstjern | Østfold, Norway | 1 | 1 | 0 | 1994-05-27 | |
| Lomma | Akershus, Norway | 1 | 1 | 0 | 1997-04-30 | |
| Mjøsa | Innlandet, Norway | 2 | 1 | 0 | 2000-10-09 |
| Site | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. | |
|---|---|---|---|---|---|---|
| Ledengstjern | Østfold, Norway | 1 | 1 | 0 | 1994-05-27 | |
| Lomma | Akershus, Norway | 1 | 1 | 0 | 1997-04-30 | |
| Mjøsa | Innlandet, Norway | 2 | 1 | 0 | 2000-10-09 |