What are examples of unicellular organisms found in pond water?

Examples of unicellular organisms found in pond water include protozoa such as amoebas and paramecia, which are often observed swimming around. Additionally, various types of algae, like Chlamydomonas and Euglena, are also unicellular and contribute to the aquatic ecosystem. Bacteria, which are also unicellular, play crucial roles in nutrient cycling within the pond environment.