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Worm Blobs

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Aquatic worms braid themselves into blobs for protection against light, heat, and evaporation.

In large numbers, the worm blob behaves as both a solid and fluid.

Under light, the worm blobs contract.

The blobs tend to move toward colder areas. If the light is dim, worms will move individually, but under bright light the worms move as a blob.

Worms on the colder side pull while those in warmer areas wiggle, reducing the blob's friction.

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