| Clue | Source | Date |
|---|---|---|
| Aquatic unicellular organism with a single flagellum and reddish eye-spots | The Telegraph General Knowledge | 11 Jul 2022 |
| Lunge awkwardly in river for primitive creature there? | ||
| Single-celled organism with a flagellum | ||
| Protozoan that can photosynthesize | ||
| Cell with a flagellum | ||
| Protozoa genus |