Echinoderms

Where in NZ Marine sedimentary rock
When Ordovician (490-443 million years ago) to present
Scale A few to 30 cm long
Paragonaster, Mill Stream

Paragonaster, Mill Stream

What are they?

  • Echinoderms are marine invertebrates recognized by their radial symmetry (this means that they are mirror images of themselves along more than one axis).
  • Echinoderms can be sessile or motile and that also determines the mode by which they eat.
  • This group includes starfish, sea dollars and sea urchins.

Used for?

See some examples in our image gallery.