KARL GAFF / SCIENCE PHOTO LIBRARY KARL GAFF / SCIENCE PHOTO LIBRARY
Coleps ciliate protozoa feeding, light microscopy footage. Swarm of Coleps ciliate protozoa scavenging on organic matter. These single-celled organisms are found in water where they feed on bacteria and decaying organic matter, which they filter through membranelles in their primitive mouth, known as a buccal cavity. They also have membranelles, rows of fused cilia that are used for locomotion.
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