Final answer:
Radial symmetry is the arrangement of body parts around a central axis, found in aquatic organisms. It equips these organisms to experience the environment equally from all directions, which is advantageous for capturing prey and efficient feeding.
Step-by-step explanation:
Radial symmetry is the arrangement of body parts around a central axis, resulting in animals having top and bottom surfaces but no left and right sides or front and back. This form of symmetry is typically found in aquatic organisms, including jellyfish and sea anemones. Radial symmetry equips these organisms to experience the environment equally from all directions, which is advantageous for capturing prey and efficient feeding.