What Creatures Plant A Garden On Their Backs

There's a lot of mystery under the sea, Some of themare scary and some are insteresting, like this one. What Creatures Plant A Garden On Their Backs?

spider crabs make their own disguises from materials they find in the sea around them. they clip living sponger or fronds of seaweed with their strong pincers, and plant them on their backs. when the seaweed dies. they replace it with a fresh piece!

img source: https://bphaines.deviantart.com/art/Giant-Japanese-Spider-Crab-178721930