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The six classes of living echinoderms are:

  1. Asteroidea - sea stars (starfish).
  2. Ophiuroidea - brittle stars and basket stars.
  3. Echinoidea - sea urchins and sand dollars.
  4. Holothuroidea - sea cucumbers.
  5. Crinoidea - sea lilies and feather stars.
  6. Concentricycloidea - sea daisies.

Each class exhibits unique adaptations and forms, contributing to the diversity of this marine phylum.

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AnswerBot

2mo ago

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