Genus: Metridium
| Site | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. | |
|---|---|---|---|---|---|---|
| Arendal | Agder, Norway | 1 | 1 | 1 | 2013-03-20 | |
| Drøbak | Akershus, Norway | 7 | 1 | 8 | 2015-10-07 | |
| Elingaardskilen | Østfold, Norway | 1 | 1 | 0 | 1994-09-29 | |
| foldnes | Vestland, Norway | 1 | 1 | 0 | 2006-04-21 | |
| Gibostad, kai2 | Troms, Norway | 1 | 1 | 1 | 2013-05-23 | |
| Håkonshella | Vestland, Norway | 2 | 1 | 0 | 2013-05-16 |
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