Subclass: Rankeføttinger (Cirripedia)
| Site | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. | |
|---|---|---|---|---|---|---|
| Rognstranda | Telemark, Norway | 1 | 1 | 0 | 1993-09-27 | |
| Rolfsbukta, Fornebu | Akershus, Norway | 1 | 1 | 0 | 2010-08-25 | |
| Rosfjorden | Agder, Norway | 22 | 2 | 0 | 1995-11-01 | |
| Rotvoll/Leangen fjæra | Trøndelag, Norway | 1 | 1 | 0 | 2019-08-20 | |
| Rotvollfjæra | Trøndelag, Norway | 14 | 1 | 0 | 2017-09-05 | |
| Rypefjord | Finnmark, Norway | 7 | 1 | 0 | 1993-11-12 | |
| Ryum | Trøndelag, Norway | 2 | 1 | 0 | 2022-04-05 | |
| Rækvika | Nordland, Norway | 1 | 1 | 0 | 1994-11-29 | |
| Rødskjær | Vestfold, Norway | 69 | 3 | 0 | 2008-09-11 | |
| Rømmen/Lysøysundet | Trøndelag, Norway | 5 | 1 | 0 | 1993-11-19 | |
| Røvika | Vestfold, Norway | 78 | 4 | 0 | 2008-09-11 | |
| Røyset | Vestland, Norway | 2 | 1 | 0 | 1994-11-30 | |
| Sageneset | Vestland, Norway | 7 | 1 | 0 | 2003-09-15 | |
| Sagesund-Falkøya | Agder, Norway | 13 | 3 | 0 | 1995-09-19 | |
| Salhusstrømmen(Fastlandssiden) | Rogaland, Norway | 12 | 2 | 0 | 1995-10-04 | |
| Saltbuholmen | Agder, Norway | 2 | 1 | 0 | 1994-10-26 | |
| Salten | Trøndelag, Norway | 1 | 1 | 0 | 1993-11-26 | |
| Saltstein | Telemark, Norway | 1 | 1 | 0 | 1995-01-02 | |
| Sand | Troms, Norway | 1 | 1 | 0 | 1993-11-11 | |
| Sand-Mulvika | Vestfold, Norway | 47 | 3 | 0 | 2001-09-18 | |
| Sandeid | Rogaland, Norway | 12 | 2 | 0 | 1996-10-08 | |
| Sandeåsen | Vestfold, Norway | 46 | 2 | 0 | 1997-10-09 | |
| Sandholna | Vestland, Norway | 8 | 2 | 3 | 2019-05-24 | |
| Sandhornøy | Nordland, Norway | 6 | 1 | 0 | 1994-10-17 | |
| Sandvika | Finnmark, Norway | 22 | 2 | 0 | 1995-09-14 | |
| Sandvika | Rogaland, Norway | 20 | 2 | 0 | 1999-09-29 | |
| Sandviksfjæra | Nordland, Norway | 1 | 1 | 0 | 2021-08-27 | |
| Sandøy | Møre og Romsdal, Norway | 7 | 2 | 0 | 1996-09-20 | |
| Sandå-Skarestrand | Agder, Norway | 25 | 3 | 0 | 1995-09-21 | |
| Sandåvika | Nordland, Norway | 2 | 1 | 0 | 1994-11-29 | |
| Saura | Nordland, Norway | 19 | 3 | 0 | 1995-10-03 | |
| Selje | Vestland, Norway | 17 | 2 | 0 | 1995-09-21 | |
| Senjahopen | Troms, Norway | 2 | 1 | 0 | 1995-03-17 | |
| Senjahopen | Troms, Norway | 3 | 1 | 0 | 1993-11-15 | |
| Sigerfjord | Nordland, Norway | 24 | 2 | 0 | 1998-10-06 | |
| Silsand | Troms, Norway | 1 | 1 | 0 | 1993-09-21 | |
| Sirevåg-Ogna-Varden | Rogaland, Norway | 17 | 3 | 0 | 1996-09-26 | |
| Skallevold | Vestfold, Norway | 1 | 1 | 0 | 2001-03-21 | |
| Skarbo | Telemark, Norway | 24 | 2 | 0 | 1996-08-27 | |
| Skattval | Trøndelag, Norway | 2 | 1 | 5 | 2020-06-10 | |
| Skaug | Nordland, Norway | 19 | 1 | 0 | 1994-11-29 | |
| Skinnfelltangen | Agder, Norway | 4 | 1 | 0 | 1993-09-16 | |
| Skjebergkilen | Østfold, Norway | 26 | 3 | 0 | 1995-09-25 | |
| Skjellvika | Vestfold, Norway | 3 | 1 | 0 | 1993-09-17 | |
| Skjernøya | Agder, Norway | 31 | 2 | 0 | 1995-09-21 | |
| Skjærvøya | Trøndelag, Norway | 11 | 2 | 0 | 1993-10-13 | |
| Skogerøya | Agder, Norway | 50 | 3 | 0 | 1997-10-02 | |
| Skoklefald | Akershus, Norway | 8 | 1 | 0 | 1993-10-13 | |
| Skottevig | Agder, Norway | 12 | 3 | 0 | 1995-10-09 | |
| Skånevik | Vestland, Norway | 34 | 2 | 0 | 1996-10-04 |
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