• Paramecia are ciliate protozoa commonly found in freshwater habitats. 
  • They possess cilia, small hair-like structures, that aid in movement and sweeping food into their oral grooves.
  • These protozoans exemplify the vast diversity of habitats they can occupy, from free-living in freshwater environments to parasitic forms residing within their hosts. 
  • Ecological Role: Paramecia plays a role in controlling bacterial populations in freshwater ecosystems, balancing microbial communities.