Carcinus maenas
| Participant | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. |
|---|---|---|---|---|---|
| Sandgotna skole | Vestland, Norway | 242 | 1 | 95 | 2020-06-12 |
| Senja videregående skole | Troms, Norway | 144 | 1 | 5 | 2023-10-30 |
| Mathopen skole | Vestland, Norway | 134 | 1 | 95 | 2020-10-13 |
| Presterød ungdomsskole | Vestfold, Norway | 131 | 1 | 0 | 2008-10-21 |
| Roar Jørgensen | Troms, Norway | 91 | 1 | 6 | 2022-08-16 |
| Kongseik ungdomsskole | Vestfold, Norway | 81 | 1 | 0 | 2008-09-09 |
| Byskogen skole | Vestfold, Norway | 64 | 1 | 0 | 2007-05-04 |
| Ringshaug ungdomsskole | Vestfold, Norway | 63 | 1 | 0 | 2007-10-16 |
| Ytrebygda skole | Vestland, Norway | 62 | 1 | 11 | 2019-05-24 |
| Sandnes skole | Agder, Norway | 41 | 1 | 34 | 2017-10-18 |
| Nidarvoll skole | Trøndelag, Norway | 36 | 1 | 0 | 2017-09-01 |
| Mosterøy skole | Rogaland, Norway | 32 | 1 | 7 | 2021-09-22 |
| Randaberg videregående skole | Rogaland, Norway | 32 | 1 | 5 | 2023-09-18 |
| Sem skole | Vestfold, Norway | 32 | 1 | 0 | 2008-08-26 |
| Fagerholt skole | Agder, Norway | 28 | 1 | 0 | 2021-08-31 |
| Bergen Kristne grunnskole | Vestland, Norway | 26 | 1 | 0 | 2018-06-14 |
| Tertnes skole | Vestland, Norway | 25 | 1 | 0 | 2019-05-28 |
| Markaplassen skole | Trøndelag, Norway | 21 | 1 | 1 | 2021-06-09 |
| Tjøme ungdomsskole | Vestfold, Norway | 20 | 1 | 1 | 2014-09-24 |
| Skjold skule | Rogaland, Norway | 19 | 1 | 11 | 2018-08-28 |
| Føynland skole | Vestfold, Norway | 19 | 1 | 0 | 2018-09-07 |
| Steinerskolen på Rotvoll | Trøndelag, Norway | 15 | 1 | 11 | 2019-08-23 |
| Kruge leirskole | Vestfold, Norway | 15 | 1 | 0 | 1995-09-27 |
| Nærøy ungdomsskole | Trøndelag, Norway | 15 | 1 | 0 | 2016-09-12 |
| Skjelnan skole | Troms, Norway | 14 | 1 | 0 | 2009-06-12 |
| Ågotnes skule | Vestland, Norway | 14 | 1 | 6 | 2015-09-02 |
| Hvalstad skole | Akershus, Norway | 13 | 1 | 0 | 2017-09-20 |
| Tofte skole | Akershus, Norway | 13 | 1 | 0 | 2020-09-04 |
| Bjørndalsskogen skole | Vestland, Norway | 13 | 1 | 11 | 2016-05-31 |
| Leonie Johann | Nordland, Norway | 12 | 1 | 6 | 2014-10-09 |
| Langmyra skole | Møre og Romsdal, Norway | 12 | 1 | 7 | 2020-09-02 |
| Trondheim katedralskole | Trøndelag, Norway | 12 | 1 | 9 | 2021-09-10 |
| Karlsvika Alternative skole | Vestfold, Norway | 11 | 1 | 0 | 1997-04-25 |
| Bygstad skule | Vestland, Norway | 11 | 1 | 1 | 2021-10-06 |
| Strandvik Montessoriskule | Vestland, Norway | 10 | 1 | 1 | 2021-06-15 |
| Granly barne- og ungdomsskole | Vestfold, Norway | 10 | 1 | 0 | 1995-10-26 |
| Friluftsrådet Sør | Agder, Norway | 8 | 1 | 8 | 2014-09-04 |
| Vadmyra skole | Vestland, Norway | 7 | 1 | 0 | 2022-09-28 |
| Kirkevoll barne- og ungdomsskole | Vestland, Norway | 7 | 1 | 1 | 2003-09-15 |
| Kvinnherad vidaregåande skule | Vestland, Norway | 6 | 1 | 4 | 2015-08-31 |
| Kvaløysletta skole | Troms, Norway | 6 | 1 | 1 | 2019-09-20 |
| Flaktveit skole | Vestland, Norway | 6 | 1 | 4 | 2018-05-23 |
| Universitetet i Tromsø | Troms, Norway | 6 | 1 | 7 | 2014-08-29 |
| Hop skole | Vestland, Norway | 6 | 1 | 4 | 2017-10-05 |
| Vollan skole | Trøndelag, Norway | 6 | 1 | 1 | 2020-06-04 |
| Oslo katedralskole | Oslo, Norway | 5 | 1 | 2 | 2016-10-23 |
| Flekke skule | Vestland, Norway | 5 | 1 | 5 | 2014-10-01 |
| Ytre Namdal videregående skole | Trøndelag, Norway | 4 | 1 | 2 | 2020-10-22 |
| Eivindvik skule | Vestland, Norway | 4 | 1 | 5 | 2017-09-27 |
| Ryenberget skole | Oslo, Norway | 4 | 1 | 0 | 2015-09-10 |