Species: Chanelled Wrack (Pelvetia canaliculata)
| Site | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. | |
|---|---|---|---|---|---|---|
| Rækvika | Nordland, Norway | 1 | 1 | 0 | 1994-11-29 | |
| Rødskjær | Vestfold, Norway | 16 | 1 | 0 | 2007-09-11 | |
| Rømmen/Lysøysundet | Trøndelag, Norway | 6 | 1 | 0 | 1993-11-19 | |
| Røvika | Vestfold, Norway | 8 | 1 | 0 | 2003-09-02 | |
| Røyset | Vestland, Norway | 1 | 1 | 0 | 1994-11-30 | |
| Sageneset | Vestland, Norway | 6 | 1 | 1 | 2003-09-15 | |
| Sagesund-Falkøya | Agder, Norway | 5 | 1 | 0 | 1995-09-19 | |
| Salhusstrømmen(Fastlandssiden) | Rogaland, Norway | 2 | 1 | 0 | 1995-10-04 | |
| Salten | Trøndelag, Norway | 1 | 1 | 0 | 1993-11-26 | |
| Sand-Mulvika | Vestfold, Norway | 8 | 1 | 0 | 2001-09-18 | |
| Sandeid | Rogaland, Norway | 10 | 1 | 0 | 1997-10-15 | |
| Sandeåsen | Vestfold, Norway | 9 | 1 | 0 | 1994-10-14 | |
| Sandholna | Vestland, Norway | 4 | 1 | 1 | 2019-05-24 | |
| Sandhornøy | Nordland, Norway | 9 | 1 | 0 | 1994-10-17 | |
| Sandvika | Rogaland, Norway | 18 | 1 | 0 | 1998-10-05 | |
| Sandvika | Finnmark, Norway | 12 | 1 | 0 | 1995-09-14 | |
| Sandøy | Møre og Romsdal, Norway | 13 | 1 | 0 | 1996-09-20 | |
| Sandå-Skarestrand | Agder, Norway | 7 | 1 | 0 | 1995-09-21 | |
| Saura | Nordland, Norway | 20 | 1 | 0 | 1995-10-03 | |
| Selje | Vestland, Norway | 21 | 1 | 0 | 1995-09-21 | |
| Senjahopen | Troms, Norway | 5 | 1 | 0 | 1995-03-17 | |
| Sigerfjord | Nordland, Norway | 24 | 1 | 0 | 1998-10-06 | |
| Sirevåg-Ogna-Varden | Rogaland, Norway | 4 | 1 | 0 | 1996-09-26 | |
| Skarbo | Telemark, Norway | 4 | 1 | 0 | 1996-08-27 | |
| Skattval | Trøndelag, Norway | 1 | 1 | 1 | 2020-06-10 | |
| Skatval | Trøndelag, Norway | 1 | 1 | 1 | 2020-06-10 | |
| Skaug | Nordland, Norway | 25 | 1 | 0 | 1994-11-29 | |
| Skjebergkilen | Østfold, Norway | 7 | 1 | 0 | 1995-09-25 | |
| Skjellvika | Vestfold, Norway | 3 | 1 | 0 | 1993-09-17 | |
| Skjernøya | Agder, Norway | 5 | 1 | 0 | 1995-09-21 | |
| Skjærvøya | Trøndelag, Norway | 16 | 1 | 0 | 1993-10-13 | |
| Skogerøya | Agder, Norway | 8 | 1 | 0 | 1997-10-02 | |
| Skoklefald | Akershus, Norway | 1 | 1 | 0 | 1993-10-13 | |
| Skottevig | Agder, Norway | 3 | 1 | 0 | 1995-10-09 | |
| Skånevik | Vestland, Norway | 39 | 1 | 0 | 1996-10-04 | |
| Skåraneset | Rogaland, Norway | 6 | 1 | 0 | 1995-10-02 | |
| Slagen | Vestfold, Norway | 10 | 1 | 0 | 1997-09-25 | |
| Slemmestad | Akershus, Norway | 3 | 1 | 0 | 1996-09-16 | |
| Sola | Rogaland, Norway | 2 | 1 | 0 | 1995-09-08 | |
| Solastranda og Ølberg | Rogaland, Norway | 6 | 1 | 0 | 2004-06-11 | |
| Solveig fjæra | Troms, Norway | 1 | 1 | 0 | 2017-09-01 | |
| Songebukta | Agder, Norway | 2 | 1 | 0 | 1994-12-05 | |
| Sortland | Nordland, Norway | 26 | 1 | 0 | 1996-10-02 | |
| Spervik | Vestfold, Norway | 6 | 1 | 0 | 1997-10-09 | |
| Spildepollen | Vestland, Norway | 3 | 1 | 0 | 1996-10-18 | |
| Spildra | Nordland, Norway | 16 | 1 | 0 | 1998-10-07 | |
| Stathelle | Telemark, Norway | 5 | 1 | 0 | 1997-09-24 | |
| Statland | Trøndelag, Norway | 51 | 1 | 0 | 1996-06-19 | |
| Stavern | Vestfold, Norway | 6 | 1 | 0 | 1998-10-06 | |
| Stavern | Vestfold, Norway | 1 | 1 | 0 | 1995-09-08 |
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