Phylum: Annelid worms (Annelida)
| Site | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. | |
|---|
| Bergavegen 116, Rogne | Innlandet, Norway | 2 | 2 | 1 | 2010-09-08 | |
| Bergerbukta | Buskerud, Norway | 1 | 1 | 0 | 1994-12-09 | |
| Bergvikvatnet | Nordland, Norway | 9 | 4 | 0 | 1992-08-28 | |
| Bjellandstrand | Agder, Norway | 2 | 2 | 2 | 2014-05-14 | |
| Bjellandstrand | Agder, Norway | 3 | 2 | 3 | 2015-06-04 | |
| Bjellanstrand | Agder, Norway | 1 | 1 | 1 | 2017-11-01 | |
| Bjerkvik | Nordland, Norway | 40 | 1 | 0 | 1998-09-29 | |
| Bjoa | Rogaland, Norway | 6 | 1 | 0 | 1996-09-05 | |
| Bjorvika-Melkevika | Vestland, Norway | 3 | 1 | 0 | 1996-09-27 | |
| Bjørndalsbrotet | Vestland, Norway | 4 | 4 | 0 | 2010-09-01 | |
| Bjørnedammen | Akershus, Norway | 1 | 1 | 0 | 2013-09-19 | |
| Bjørnsandfjæra | Nordland, Norway | 3 | 1 | 0 | 1996-09-17 | |
| Bjørnstad-dammen | Innlandet, Norway | 2 | 2 | 0 | 2013-09-06 | |
| Bjørsvikelva | Vestland, Norway | 1 | 1 | 0 | 2002-10-07 | |
| Blakstadbukta-Vollen | Akershus, Norway | 2 | 1 | 0 | 1994-01-13 | |
| Bleikstranda | Nordland, Norway | 7 | 1 | 0 | 1997-10-22 | |
| Blokknr 1 | Trøndelag, Norway | 4 | 1 | 0 | 1996-10-23 | |
| Blokknr 1 | Møre og Romsdal, Norway | 1 | 1 | 0 | 1996-09-19 | |
| Blokknr 118 | Møre og Romsdal, Norway | 3 | 1 | 0 | 1996-09-20 | |
| Blokknr 118 | Møre og Romsdal, Norway | 9 | 1 | 0 | 1996-09-20 | |
| Blokknr 131 | Møre og Romsdal, Norway | 1 | 1 | 0 | 1996-09-20 | |
| Blokknr 132 | Møre og Romsdal, Norway | 2 | 1 | 0 | 1996-10-18 | |
| Blokknr 2 | Vestfold, Norway | 3 | 1 | 0 | 1996-09-19 | |
| Blokknr 40 | Troms, Norway | 15 | 1 | 0 | 1997-10-09 | |
| Blokknr 71 | Nordland, Norway | 2 | 1 | 0 | 1995-10-19 | |
| Blokknr 95 | Vestfold, Norway | 3 | 1 | 0 | 1997-09-10 | |
| Bodin gård | Nordland, Norway | 5 | 5 | 0 | 2010-09-02 | |
| Bodø vgs Værstasjon | Nordland, Norway | 2 | 2 | 0 | 2010-09-24 | |
| Bodøsjøen | Nordland, Norway | 2 | 1 | 1 | 2018-04-05 | |
| Bogen | Vestfold, Norway | 4 | 1 | 0 | 1995-10-10 | |
| Bogen | Vestfold, Norway | 16 | 1 | 0 | 2001-05-08 | |
| Bogstadvannet | Oslo, Norway | 1 | 1 | 0 | 1993-06-10 | |
| Bolga | Nordland, Norway | 5 | 5 | 0 | 2010-09-13 | |
| Borg | Nordland, Norway | 6 | 6 | 0 | 2010-09-15 | |
| Borgtun skole | Troms, Norway | 52 | 7 | 35 | 2010-09-22 | |
| Bota | Vestland, Norway | 1 | 1 | 0 | 2015-09-12 | |
| Botnavatnet | Rogaland, Norway | 3 | 2 | 0 | 1991-09-10 | |
| Botngård | Trøndelag, Norway | 25 | 1 | 0 | 1996-09-18 | |
| Bragdøya | Agder, Norway | 1 | 1 | 0 | 1994-05-27 | |
| Brandal | Møre og Romsdal, Norway | 1 | 1 | 0 | 1996-10-16 | |
| Brattbakken 4 | Akershus, Norway | 32 | 8 | 0 | 2008-04-09 | |
| Brattbakken 4 | Akershus, Norway | 10 | 8 | 7 | 2010-09-04 | |
| Bratteberg skule | Møre og Romsdal, Norway | 12 | 6 | 9 | 2010-09-22 | |
| Bredvik | Møre og Romsdal, Norway | 24 | 1 | 0 | 1997-06-11 | |
| Breimoenbekken | Agder, Norway | 6 | 2 | 0 | 1995-05-11 | |
| Brekkabøen | Vestland, Norway | 1 | 1 | 0 | 2016-09-14 | |
| Brekke | Vestland, Norway | 2 | 1 | 0 | 1993-09-01 | |
| Brekkåsen | Trøndelag, Norway | 5 | 4 | 4 | 2010-10-07 | |
| Bringsværd | Agder, Norway | 8 | 5 | 6 | 2010-09-30 | |
| Bruhaugvannet | Nordland, Norway | 2 | 2 | 0 | 2013-09-24 | |
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