guide to the marine zooplankton of south eastern Australia
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sea urchin
An unidentified larval Echinoid (sea urchin)



Image Key > Echinodermata

Echinodermata Klein 1734

Select from one of the following:

Echinoidea Asteroidea
Echinoidea
Pluteus Larva

Asteroidea
Sea Stars

Taxonomy
Superphylum Deuterostomia
Phylum Echinodermata
Size
  • Variable due to species and stage of larval development.
Description
  • Greek term for ‘spiny skin’.
  • Approximately 7,000 living species.
  • Includes starfish, brittle stars, sea urchins, sand dollars, sea cucumbers and feather stars.
Distribution
  • Worldwide.
  • All depths.
Ecology
  • Meroplankton.
  • Metamorphosis is rapid.
 

 

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