Check sibling questions
  • They are exclusively marine animals.
  • They are triploblastic and have a coelomic cavity.
  • These are spiny skinned organisms.
  • They exhibit organ system level of organization. Most members have a circulatory system as well as a digestive system.
  • They also have a peculiar water-driven tube system that they use for moving around.
  • They have hard calcium carbonate structures that they use as a skeleton. 

For Example: sea stars, sea urchins.

Maths Crash Course - Live lectures + all videos + Real time Doubt solving!

Ask a doubt (live)
Maninder Singh's photo - Co-founder, Teachoo

Made by

Maninder Singh

CA Maninder Singh is a Chartered Accountant for the past 12 years and a teacher from the past 16 years. He teaches Science, Economics, Accounting and English at Teachoo