Boing Boing Staging

Cool demonstration of how sponges eat

Shape of Life is a classic series produced by Sea Studios Foundation. Here, they show how sponges feed by placing harmless dye around the outside of a sponge.

The speed of water absorption is a good indicator of sponge health. Johnathan Bird repeated the demonstration years later on his own series:

Sponges: Filter Feeding Made Visible (Vimeo / Shape of Life)

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