What makes echinoderms unique to all other animals? (think of systems/structures they have that no other animal has!)

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asked Jan 15, 2022 30.4k views

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Tyr · Answer 1 · 2022-01-22T09:12:56+0000

Although these spines may look like components of an exoskeleton at first glance, echinoderms do not have an exoskeleton. This is partly due to their symmetry and their spiny endoskeleton.

What makes echinoderms unique to all other animals? (think of systems/structures they have that no other animal has!)

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