Echinoderms, such as starfish, sea urchins and sea lilies, use small, flexible, tubular projections called "tube feet" for locomotion, feeding, respiration and sensory perception. Crinoids, a subgroup of echinoderms, are known to have a long fossil record, but these fossils usually preserve only...
Source: [Phys.org](https://phys.org/news/2026-06-oldest-tube-feet-reveals-clues.html)