No. They cling to the ground and rocks, and coral with their little tentacles. They are able to move around, but they stay on the surface, they don’t just swim around freely.
No sea urchins have tube feet, small tubular projections found in sea urchins, sand dollars and sea cucumbers. These tube feet aid in locomotion and feeding. These tubes operate through hydraulic pressure and can stick to the ocean floor and move very slowly.
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