1. The actinal surface of the sea star is covered in tube feet used for movement and feeding.
海星的辐射面覆盖着用于移动和进食的管足。

2. The actinal side of the sea urchin has its mouth and tube feet for feeding and locomotion.
海胆的辐射面有嘴和管足，用于进食和移动。

3. The actinal portion of the sea anemone is where its tentacles and mouth are located.
海葵的辐射部分是其触手和口的位置。

4. The actinal surface of the sea cucumber is covered in tiny tube feet used for locomotion.
海参的辐射面覆盖着用于移动的小管足。

5. The actinal side of the sea lily has its feeding apparatus and tube feet for capturing food.
海百合的辐射面有捕食器官和管足，用于捕食。

6. The actinal surface of the sea sponge is covered in pores for filtering food particles from the water.
海绵的辐射面覆盖着用于过滤水中食物颗粒的孔。