| Spirogyra sp. | | 2005-09-06 | 2005-08-30 | Harestuvannet (Akershus, Norway) |
| Spirogyra sp. | | 1990-05-28 | 1990-05-28 | Granavatnet (Trøndelag, Norway) |
| Spirogyra sp. | | 1989-08-29 | 1989-08-29 | Jarenvannet (Innlandet, Norway) |
| Spirogyra sp. | | 1989-09-21 | 1989-09-21 | Semsvannet (Akershus, Norway) |
| Spirogyra sp. | | 1989-09-13 | 1989-09-13 | Skarvatnet (Møre og Romsdal, Norway) |
| Spirogyra sp. | | 1989-09-07 | 1989-09-07 | Tveitevannet (Vestland, Norway) |
| Spirogyra sp. | | 1989-08-24 | 1989-08-24 | Vålåsjøen (Innlandet, Norway) |
| Spirogyra sp. | | 1989-10-04 | 1989-10-04 | Nøklevann (Oslo, Norway) |
| Spirogyra sp. | | 1989-10-06 | 1989-10-06 | Steglevannet (Buskerud, Norway) |
| Spirogyra sp. | | 1989-10-11 | 1989-10-11 | Rørvatnet (Møre og Romsdal, Norway) |
| Spirogyra sp. | | 1989-09-13 | 1989-09-13 | Reinsvolldammen (Innlandet, Norway) |
| Spirogyra sp. | | 1989-09-13 | 1989-09-13 | Litlvatnet (Trøndelag, Norway) |
| Spirogyra sp. | | 1989-09-06 | 1989-09-06 | Rossevatn (Rogaland, Norway) |
| Spirogyra sp. | | 1989-09-14 | 1989-09-14 | Sillongen (Innlandet, Norway) |
| Spirogyra sp. | | 1989-08-31 | 1989-08-31 | Raudsjøen (Trøndelag, Norway) |
| Spirogyra sp. | | 1989-09-28 | 1989-09-28 | Husavatnet (Vestland, Norway) |
| Spirogyra sp. | | 1989-09-01 | 1989-09-01 | Øvre Storfjordvatnet (Nordland, Norway) |
| Spirogyra sp. | | 1989-09-08 | 1989-09-08 | Trytetjønnet (Buskerud, Norway) |
| Spirogyra sp. | | 1989-09-07 | 1989-09-07 | Tveitevannet (Vestland, Norway) |
| Spirogyra sp. | | 1990-09-11 | 1990-09-11 | Hammervatnet (Trøndelag, Norway) |
| Spirogyra sp. | | 1991-06-14 | 1991-06-14 | Rørvatnet (Møre og Romsdal, Norway) |
| Spirogyra sp. | | 1990-08-30 | 1990-08-30 | Øvre Storfjordvatnet (Nordland, Norway) |
| Spirogyra sp. | | 1990-05-25 | 1990-05-25 | Øvre Storfjordvatnet (Nordland, Norway) |
Sustain.no is provided by the Norwegian Centre for Science Education