It is a single-cell eukaryote having a flagella-like appendage.
They belong to the kingdom Protista.
It is found in fresh water and salt water.
Euglena is a genus of eukaryotic, unicellular, and flagellated microorganisms. They contain a well-defined nucleus and other cellular organelles such as mitochondria, endoplasmic reticulum, chloroplasts, and Golgi bodies, etc.
They perform photosynthesis in light and help in searching for food.