Genus: Metridium
| Year | Arter/grupper | Localities | Participants | Observations |
|---|---|---|---|---|
| 2015 | 1 | 1 | 1 | 4 |
| 2014 | 1 | 1 | 1 | 3 |
| 2013 | 1 | 3 | 3 | 4 |
| 2006 | 1 | 1 | 1 | 1 |
| 1994 | 1 | 1 | 1 | 1 |
| Totalt alle år | 1 | 6 | 6 | 13 |
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Responsible editor: Doris Jorde