Euglena don't have traditional "locomotory organs" like legs or fins. They move using a flagellum.

Here's a breakdown:

* Flagellum: A long, whip-like structure that protrudes from the cell. It moves in a wave-like motion, propelling the Euglena through its watery environment. Euglena usually have one or two flagella.

Euglena are fascinating single-celled organisms that demonstrate the diversity of movement strategies in the microscopic world.