The ciliates are unicellular microorganisms that have the highest degree of structural complexity. They have as a means of locomotion the cilia, which are short and numerous organelles, protruding from the wall of the cell and performing coordinated rhythmic beats. In addition to the locomotion, the eyelashes are also useful for the capture of organic particles as food and bacteria, thereby clarifying the effluent. Ciliates are subdivided into four groups:


Free Swimming Ciliates


Ciliates, predators of flakes


Fixed ciliates


Carnivorous ciliates