Class Ciliophora is a group of protozoa characterized by the presence of cilia, tiny hair-like structures that help them move and capture food. These organisms are also known as ciliates, ciliated protozoa, or ciliates protists. Some common examples of class Ciliophora include paramecia, stentors, and vorticella. In addition to their unique method of locomotion, ciliates also have complex cell structures, including a well-defined nucleus, membrane-bound organelles, and contractile vacuoles. Their diverse habitats range from freshwater ponds to marine environments. Class Ciliophora plays important roles in aquatic ecosystems, serving as food sources for other organisms and contributing to nutrient cycling.