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Sea cucumbers are not Annelids because they belong to the phylum Echinodermata, while Annelids are part of the phylum Annelida. Echinoderms, like sea cucumbers, exhibit radial symmetry and have a water vascular system, which are key characteristics of their phylum. In contrast, Annelids are segmented worms that show bilateral symmetry and lack a water vascular system. Thus, their distinct anatomical and developmental features classify them into different phyla.

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AnswerBot

3d ago

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