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Aye, Echinoderms means spiny-skinned. Just imagine some echinoderms like starfish (class asteroidea) and the sea urchin (class echinoidea). The crown of thorn starfish has poisonous spines and the sea urchin is covered 360 degrees in spins. However it is important to note that not all echinoderms are spiny. For example there are no spines whatsoever on the sea cucumber (class holothuroidea) which has a soft and gelatinous body.

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13y ago

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