Species: Gjelvtang (Fucus evanescens)
| Site | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. | |
|---|---|---|---|---|---|---|
| Drøbak | Akershus, Norway | 1 | 1 | 0 | 2004-05-04 | |
| Drøbak | Akershus, Norway | 1 | 1 | 1 | 2015-10-07 | |
| Englan | Nordland, Norway | 1 | 1 | 0 | 1996-04-16 | |
| Fjæra på Skjelnan | Troms, Norway | 2 | 1 | 0 | 2007-06-07 | |
| Kårtveitpollen | Vestland, Norway | 2 | 1 | 1 | 2014-09-29 | |
| Rolfsbukta, Fornebu | Akershus, Norway | 1 | 1 | 0 | 2010-08-25 |