Radial symmetry is seen in organisms with no left or right side, as they can be cut symmetrically through numerous planes. It refers to the regular arrangement of body parts around a central point. These organisms only have a defined dorsal and ventral surface. The starfish in the photo above is definitely radially symmetrical as there is no distinguishable left or right side, and it can be cut through many planes symmetrically. Sea stars are echinoderms, a phylum of marine life distinctly known for their five point radial symmetry.