Uploaded May 2026 | Updated September 2026, 2 weeks ago

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Relax with Paramecium bursaria, filmed with a 40x oil immersion objective.

Each cell carries hundreds of symbiotic green algae. In light, the algae photosynthesize and share products with the host, while the paramecium moves, feeds, and regulates that internal population as conditions change.

Occasionally, other protists pass through the field of view, including Trachelomonas and various euglenoids.

No narration—just a few minutes to watch it unfold.

#paramecium #microscopy #microcosmos