Can pond scum move

Yes, pond scum, often composed of algae and other microscopic organisms, can exhibit movement. Many types of algae, such as green algae, can move through water via flagella, which are tail-like structures that propel them. Additionally, some organisms within pond scum can engage in movement through processes like gliding or using cilia. Therefore, while the term "scum" may imply a static layer, the microorganisms within can be quite dynamic.