These rotifers are prevalent members of freshwater ecosystems, constituting a significant portion of the microbiota. With an average size of approximately 100 micrometers, they are too small to be observed without the aid of a microscope. Under magnification, their intricate structure and beauty become apparent. Encased within a protective shell composed of two closely connected plates, their bodies exhibit a distinctive C-shaped concave contour along the anterior edges, reminiscent of a fork. At the lower end of the body, there is a mobile foot bearing two equally long toes, which serve both for attachment to surfaces and for locomotion.