Higher classification: Deuterostome
Scientific name: Echinodermata
Kingdom: Animalia
Subkingdom:Eumetazoa
  • They have a star-like appearance and are spherical or elongated.
  • They are exclusively marine animals.
  • The organisms are spiny-skinned.
  • They exhibit organ system level of organization. …
  • They are triploblastic and have a coelomic cavity.
  • The skeleton is made up of calcium carbonate.
  •  Echinoderm means ‘spiny skin’.
  • Some sea urchins bury themselves under the sand.
  • The mouthparts of the sea urchin are called ‘Aristotle’s Lantern’,

  • The tube feet aids in locomotion.

  • They reproduce sexually through gametic fusion and asexually through regeneration. Fert

  • ilization is external.

  • The development is indirect.

  • They possess the power of regeneration.

  • They have poorly developed sense organs. These include chemoreceptors, tactile organs, terminal tentacles, etc.