17. Radial Symmetry

This is a picture of a starfish. A starfish represents radial symmetry. Radial symmetry is a body form where equal parts radiate outwards from a center. Cnidarians and echinoderms, which includes starfish, are characterized by their radial symmetry. Five lines that cut through the center of a starfish will result in five equal parts. Because it is radially symmetric, a starfish does not have a head, a left side, or a right side.