| Tjernaks (Potamogeton natans) | | 2000-06-15 | 2000-06-07 | Gårdsdam - Hvam vgs. (Akershus, Norway) |
| Småtjernaks (Potamogeton berchtoldii) | | 1998-09-07 | 1998-09-07 | Storeidvatnet (Nordland, Norway) |
| Grastjernaks (Potamogeton gramineus) | | 1997-09-04 | 1997-09-04 | Granavatnet (Trøndelag, Norway) |
| Hjertetjernaks (Potamogeton perfoliatus) | | 1996-09-09 | 1996-09-09 | Korssjøen (Vestfold, Norway) |
| Tjernaks (Potamogeton natans) | | 1991-08-28 | 1991-08-28 | Kruktjønna (Trøndelag, Norway) |
| Grastjernaks (Potamogeton gramineus) | | 1993-08-31 | 1993-08-31 | Granavatnet (Trøndelag, Norway) |
| Hjertetjernaks (Potamogeton perfoliatus) | | 1991-09-10 | 1991-09-10 | Granavatnet (Trøndelag, Norway) |
| Butt-tjernaks (Potamogeton obtusifolius) | | 1992-10-05 | 1992-10-05 | Frøylandsvatnet (Rogaland, Norway) |
| Tjønnaks (Potamogeton sp.) | | 1992-09-18 | 1992-09-18 | Reiarsvatnet (Rogaland, Norway) |
| Tjernaks (Potamogeton natans) | | 1991-09-16 | 1991-09-16 | Reiarsvatnet (Rogaland, Norway) |
| Tjønnaks (Potamogeton sp.) | | 1989-09-18 | 1989-09-18 | Reiarsvatnet (Rogaland, Norway) |
| Hjertetjernaks (Potamogeton perfoliatus) | | 1992-09-08 | 1992-09-08 | Hostadvatnet (Møre og Romsdal, Norway) |
| Tjernaks (Potamogeton natans) | | 1990-09-18 | 1990-09-18 | Hostadvatnet (Møre og Romsdal, Norway) |
| Tjernaks (Potamogeton natans) | | 1991-08-28 | 1991-08-28 | Koltjønna (Trøndelag, Norway) |
| Grastjernaks (Potamogeton gramineus) | | 1994-06-10 | 1994-06-10 | Spildervatnet (Nordland, Norway) |
| Tjernaks (Potamogeton natans) | | 1989-09-01 | 1989-09-01 | Kolbjørnviksjøen (Østfold, Norway) |
| Tjernaks (Potamogeton natans) | | 1992-09-09 | 1992-09-09 | Kvitblikkvannet (Nordland, Norway) |
| Hjertetjernaks (Potamogeton perfoliatus) | | 1992-09-09 | 1992-09-09 | Kvitblikkvannet (Nordland, Norway) |
| Tjernaks (Potamogeton natans) | | 1990-09-04 | 1990-09-04 | Kvitblikkvannet (Nordland, Norway) |
| Tjernaks (Potamogeton natans) | | 1991-09-25 | 1991-09-25 | Kvitblikkvannet (Nordland, Norway) |
| Grastjernaks (Potamogeton gramineus) | | 1991-09-25 | 1991-09-25 | Kvitblikkvannet (Nordland, Norway) |
| Krustjernaks (Potamogeton crispus) | | 1993-09-02 | 1993-09-02 | Kvitblikkvannet (Nordland, Norway) |
| Hjertetjernaks (Potamogeton perfoliatus) | | 1993-09-02 | 1993-09-02 | Kvitblikkvannet (Nordland, Norway) |
| Tjernaks (Potamogeton natans) | | 1993-09-02 | 1993-09-02 | Kvitblikkvannet (Nordland, Norway) |
| Tjernaks (Potamogeton natans) | | 1990-09-12 | 1990-09-12 | Korssjøen (Vestfold, Norway) |
| Tjønnaks (Potamogeton sp.) | | 1994-09-05 | 1994-09-05 | Korssjøen (Vestfold, Norway) |
| Tjernaks (Potamogeton natans) | | 1993-09-09 | 1993-09-09 | Korssjøen (Vestfold, Norway) |
| Tjernaks (Potamogeton natans) | | 1990-09-18 | 1990-09-18 | Skjelbreidvatnet (Vestland, Norway) |
| Tjernaks (Potamogeton natans) | | 2000-09-21 | 2000-09-08 | Krussætertjern (Østfold, Norway) |
Sustain.no is provided by the Norwegian Centre for Science Education