Phylum: Molluscs (Mollusca)
| Site | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. | |
|---|
| Blokknr 40 | Rogaland, Norway | 61 | 8 | 0 | 1997-10-02 | |
| Blokknr 40 | Troms, Norway | 327 | 15 | 0 | 1997-10-09 | |
| Blokknr 54 | Møre og Romsdal, Norway | 10 | 6 | 0 | 1997-10-01 | |
| Blokknr 71 | Nordland, Norway | 40 | 10 | 0 | 1995-10-19 | |
| Blokknr 95 | Vestfold, Norway | 43 | 9 | 0 | 1997-09-10 | |
| Blokknummer 81 | Møre og Romsdal, Norway | 31 | 9 | 0 | 1996-11-11 | |
| Blommenholm | Akershus, Norway | 1 | 1 | 1 | 2016-06-07 | |
| Bodø | Nordland, Norway | 1 | 1 | 0 | 2013-09-25 | |
| Bodøsjøen | Nordland, Norway | 9 | 3 | 7 | 2017-05-15 | |
| Bogen | Vestfold, Norway | 332 | 14 | 0 | 2001-05-08 | |
| Bogen | Vestfold, Norway | 88 | 11 | 0 | 1998-09-10 | |
| Bogstadvannet | Oslo, Norway | 6 | 4 | 0 | 1995-06-09 | |
| Bollebekken | Innlandet, Norway | 1 | 1 | 0 | 2014-09-19 | |
| Bommestad | Vestfold, Norway | 1 | 1 | 0 | 2005-08-25 | |
| Borgenhaugen | Østfold, Norway | 1 | 1 | 1 | 2017-09-14 | |
| Bota | Vestland, Norway | 6 | 6 | 0 | 2015-09-12 | |
| Botngård | Trøndelag, Norway | 278 | 16 | 0 | 1996-09-18 | |
| Botnhamn, fergekai | Troms, Norway | 1 | 1 | 0 | 2015-09-29 | |
| Bragdøya | Agder, Norway | 14 | 6 | 0 | 1994-06-09 | |
| Brandal | Møre og Romsdal, Norway | 63 | 11 | 0 | 1996-10-16 | |
| Brannfjell | Oslo, Norway | 1 | 1 | 1 | 2016-06-05 | |
| Bratner | Østfold, Norway | 1 | 1 | 1 | 2013-05-29 | |
| Bratsbergkleiva skole | Telemark, Norway | 3 | 1 | 0 | 2020-03-26 | |
| Bredvik | Møre og Romsdal, Norway | 166 | 12 | 0 | 1997-06-11 | |
| Breimoenbekken | Agder, Norway | 12 | 4 | 0 | 1995-05-11 | |
| Breistein | Vestland, Norway | 1 | 1 | 1 | 2012-05-16 | |
| Brekkabøen | Vestland, Norway | 2 | 1 | 2 | 2016-09-14 | |
| Brekke | Vestland, Norway | 64 | 9 | 0 | 1993-09-01 | |
| Bruhaugvannet | Nordland, Norway | 2 | 2 | 0 | 2013-09-24 | |
| Bruvik | Vestland, Norway | 1 | 1 | 1 | 2007-05-06 | |
| Bryggevika | Nordland, Norway | 88 | 9 | 0 | 1994-11-28 | |
| Brønnerud skolehage | Akershus, Norway | 2 | 1 | 0 | 2014-04-22 | |
| Brånås | Akershus, Norway | 2 | 1 | 2 | 2015-06-02 | |
| Budal | Vestfold, Norway | 140 | 10 | 0 | 1994-11-30 | |
| Burudvann | Akershus, Norway | 1 | 1 | 0 | 1993-09-14 | |
| buskerud landbruksskole | Buskerud, Norway | 2 | 2 | 0 | 2013-08-28 | |
| Buvatnet | Møre og Romsdal, Norway | 1 | 1 | 0 | 1989-09-12 | |
| Buøy | Rogaland, Norway | 87 | 11 | 0 | 2000-09-13 | |
| Byaelva | Trøndelag, Norway | 29 | 4 | 0 | 1997-09-25 | |
| Bybaneskogen | Vestland, Norway | 19 | 19 | 7 | 2012-05-22 | |
| Bydalen | Østfold, Norway | 2 | 1 | 0 | 2019-09-19 | |
| Bygdøy | Oslo, Norway | 38 | 6 | 0 | 1995-10-30 | |
| Bygdøy | Oslo, Norway | 133 | 13 | 0 | 1996-10-21 | |
| Bygdøy | Oslo, Norway | 3 | 1 | 2 | 2016-06-03 | |
| Byrknes | Vestland, Norway | 1 | 1 | 0 | 2017-04-02 | |
| Bø - Tunge | Rogaland, Norway | 318 | 14 | 0 | 1996-10-02 | |
| Bøbekken | Akershus, Norway | 1 | 1 | 0 | 2000-08-22 | |
| Bødalen | Akershus, Norway | 1 | 1 | 0 | 2015-05-07 | |
| Bøvra | Innlandet, Norway | 1 | 1 | 0 | 1993-09-28 | |
| Bårlidbekken | Akershus, Norway | 4 | 4 | 0 | 1994-05-25 | |
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