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Watch these crabs make 'hats' out of sponges

February 14, 2019 - Sponge crabs make “hats” from sponges to protect themselves from predators. Researchers in Japan wanted to understand how the crabs decide what to wear, so they gave them plain foam sponges of varying sizes and recorded the hat-making process. Read "Watch how crabs make their own ‘hats’ using sponges."
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