Vorticella Video No. 18
These bell-shaped ciliates live in fresh or salt water attached by a slender stalk to aquatic plants, surface scum, submerged objects, or aquatic animals. The stalk contains a contractile fibril called a myoneme that causes it to coil like a spring when stimulated. Vorticella eat bacteria and small protozoans, using their cilia to sweep their prey into mouth-like openings.
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