Euglena is an oval-shaped unicellular flagellate. The cell exhibits the features of both plants and animals. The cell of Euglena is enclosed by a tough protein layer called the Pellicle. It also consists of cell membrane, nucleus, contractile vacuole, eye spot (stigma), chloroplast and flagellum.

Habitat: Euglena inhabit in fresh water rich in organic matter and mineral ions.

Locomotion: Euglena moves by means of a flagellum a whip like structure.

Nutrition: Euglena is normally autotorphic, however, in the absence of light it can feed saprophyticallu.

Reproduction: Sexual reproduction is absent in Euglena, the organism reproduces asexually by binary fission.