Porifera - sponges
... • Echinoderms are coelomates, and are segmented
• examples include sea stars (starfishes), sea urchins, sand dollars,
sea cucumbers, and sea lilies.
• 6,000 species of echinoderms; they are all marine.
• echinoderm adults have radial symmetry, but they evolved from
ancestors that were bilaterally sy ...