* Radial symmetry is a body plan where body parts are arranged around a central axis, like spokes on a wheel. While radial symmetry is common in aquatic animals like starfish, jellyfish, and sea anemones, it also occurs in some land animals like sea urchins and some types of worms.
* Tube feet are specialized structures used for movement, feeding, and attachment, primarily found in echinoderms (starfish, sea urchins, etc.). These are exclusively aquatic animals.
Therefore, while tube feet are exclusively aquatic, radial symmetry is not limited to water-dwelling creatures.
