棘皮動物 Echinoderms Creature with a pentagonal body 体が五角形の生物
Most living things on Earth have bilaterally symmetrical shapes. There are some exceptions, including echinoderms such as starfish and sea urchins. The starfish's body extends radially in five directions from the center. With this body, starfish have survived the harsh struggle for survival underwater for a long time.
