• Echinoderms are marine organisms that make up the phylum Echinodermata.
  • They can be found in the ocean from the equator to the poles.
  • They are among the most distinctive organisms within the animal kingdom.
  • Members of the phylum include sea stars (starfish), sand dollars, and feather stars.
  • Echinoderms are named for their spiny skin, which is covered by a thin layer of calcium carbonate plates and spines.
  • Adult echinoderms have radial symmetry, but larvae have bilateral symmetry.
  • Echinoderms have a unique water vascular system, with canals that extend along each body part.
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