Euglena is a genus of single-celled eukaryotic organisms found in stagnant freshwater such as ponds and lakes, forming a visible green (or sometimes red) scum on the surface. When scientists refer to Euglena, they're often talking about the model species Euglena gracilis.

Where can we find euglena?

Euglena live in fresh and brackish water habitats such as ponds rich in organic matter. Some species can form green or red “blooms” in ponds or lakes. The single cells are biflagellate, with the flagella originating in a small reservoir at the anterior of the cell.

Where are you most likely to find euglena?

Euglena are usually found to live in fresh water, streams, and in some fresh water ponds. They are usually found in places where there is a high level of chlorophyll. Because these protists are autotrophs, they can produce their own energy from chlorophyll in the same manner of plants.