What Symmetry Is Echinoderms?
What Symmetry Is Echinoderms? There are 6,000 species of echinoderms; they are all marine. Although echinoderm adults have radial symmetry, they evolved from ancestors that were bilaterally symmetrical. They have free-swimming, bilateral larvae that metamorphose (change as they mature) into adults with radial symmetry. What kind of symmetry does echinoderms? Echinoderms have a spiny endoskeleton.