Amoeba proteus is a single-celled organism commonly found in freshwater environments, such as ponds and streams. It belongs to the group of organisms known as protozoa and is characterized by its irregular shape and ability to change form. Amoeba proteus moves using temporary projections called pseudopodia, which extend and retract to help it navigate through its surroundings. This organism feeds on bacteria, algae, and other small particles by engulfing them through a process called phagocytosis. Amoeba proteus plays an important role in the ecosystem by contributing to nutrient cycling and serving as a food source for larger organisms. Its simple structure makes it a popular subject for biological studies.