Sea urchin (Echinoidea)

Echinodermata 3D Library Sea urchin
Like a hedgehog, they have globular bodied and many spines.
But, CT-scannd data indicates their pentagonal body structure, the main feature of Echinodermata.
Their mouths, also known as "Aristotle's lantern" , has pentagonal shapes too.
  1. Sea urchin Echinoidea Sea urchin Echinoidea Sea urchin Echinoidea Sea urchin Echinoidea Sea urchin Echinoidea
  2. Sea urchin Echinoidea Sea urchin Echinoidea Sea urchin Echinoidea Sea urchin Echinoidea Sea urchin Echinoidea
  3. Sea urchin Echinoidea Sea urchin Echinoidea Sea urchin Echinoidea Sea urchin Echinoidea Sea urchin Echinoidea
  4. Sea urchin Echinoidea Sea urchin Echinoidea Sea urchin Echinoidea Sea urchin Echinoidea Sea urchin Echinoidea

Sea star (Asteroidea)

Echinodermata 3D Library Sea star
They speak nothing and just sit down at the summer sandy beaches.
But their bodies star-shaped, straightly indicates the Echinodermata body plan.
  1. Sea star Asteroidea Sea star Asteroidea Sea star Asteroidea Sea star Asteroidea Sea star Asteroidea
  2. Sea star Asteroidea Sea star Asteroidea Sea star Asteroidea Sea star Asteroidea

Brittle star (Ophiuroidea)

Echinodermata 3D Library Brittle star
The group has long arms to crawl the sea floor.
Almost genus don't live in the shallow sea, so maybe you think they are uncommon, but this is a misunderstanding.
  1. Brittle star Ophiuroidea Brittle star Ophiuroidea Brittle star Ophiuroidea
  2. Brittle star Ophiuroidea Brittle star Ophiuroidea Brittle star Ophiuroidea Brittle star Ophiuroidea

Blastoidea

One group of extinced Echinodermata. Please visit CT-scanned Movin'Fossil 3D Data library.