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When small hermit and soldier crabs build their little homes (found mainly in Malaysia and Australia), they dig a deep hole in the sandy beach. When doing this, they quickly construct balls of sand so they can later easily push them to the surface, 2-3 balls at a time, making sure the sand doesn't just pile up behind them.
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After a while, a pattern emerges, not unlike a flower, a diagram or a galaxy of little sand balls. |
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If you look closely, you'll see how perfectly spherical the little balls are.
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Watch the amazing creation of the 'sand ball galaxy' in action: |
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