Euglena is a tiny, single-celled organism found in freshwater environments. It is unique because it has characteristics of both plants and animals. Like plants, Euglena contains chloroplasts, which allow it to perform photosynthesis and produce its own food using sunlight. However, it can also consume organic material when light is not available, similar to animals. This fascinating organism has a whip-like tail called a flagellum that helps it move through water. Euglena plays an important role in its ecosystem by contributing to the food chain and helping to maintain water quality. Its ability to adapt makes it a remarkable example of life's diversity.