What are the Characteristics of Phylum Echinoderm?

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  1. Echino derms are triploblastic and coleomate animals and have radial Symmetry.
  2. Body has more than two cell layers, tissues and organs.
  3. Body cavity a true coelom.
  4. Most possesses a through gut with an anus.
  5. Body shape highly variable, but with no head.
  6. Nervous system includes a circum-oesophageal ring.
  7. Has a poorly defined open circulatory system.
  8. Possesses a water vascular system, which hydraulically operates the tube feet or feeding tentacles.
  9. Without excretory organs.
  10. Normally possesses a subepidermal system of calcareous plates
  11. Marine and regeneration power development.

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