Didymo diatom in valve and girdle view

Compare with the Diatoms description: golden-brown chloroplasts inside a clear, rigid shell (frustule) of two overlapping halves.

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Video: Brandon Antonio Segura Torres & Priscilla Vieto Bonilla, CC BY-SA 4.0, via Wikimedia Commons

MP4 720p 1.6 MB MP4 360p 0.3 MB