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. ➡ Subscribe: bit.ly/NatGeoWILDSubscribe About National Geographic Wild: National Geographic Wild is a place for all things animals and for animal-lovers alike. Take a journey through the animal kingdom with us and discover things you never knew before, or rediscover your favorite animals! Get More National Geographic Wild: Official Site: bit.ly/NatGeoWILD Facebook: bit.ly/NGWFacebook Twitter: bit.ly/NGWTwitter Instagram: bit.ly/NGWInstagram Read "Watch how crabs make their own ‘hats’ using sponges." on.natgeo.com/2X07HJe Crabs Make 'Hats' Out of Sponges | Nat Geo Wild youtu.be/2vJfC_MjpxY Nat Geo Wild www.youtube.com/user/NatGeoWild