Site: Mariholmen
| Species | Scientific name | 2006 |
|---|---|---|
| Brunsli, Perlesli | Ectocarpaceae Samlegruppe | 1 |
| Bladder Wrack | Fucus vesiculosus | 1 |
| Grisetang | Ascophyllum nodosum | 1 |
| Grisetangdokke | Vertebrata lanosa | 1 |
| Spiralled Wrack | Fucus spiralis | 1 |
| Cat gut | Chorda filum | 1 |
| Sponge seaweed | Codium fragile | 1 |
| Serrated Wrack | Fucus serratus | 1 |
| Chanelled Wrack | Pelvetia canaliculata | 1 |
| Strandtagl | Chordaria flagelliformis | 1 |
| Vanlig grønndusk | Cladophora rupestris | 1 |
| Brown algae | Phaeophyta indet. | 1 |
