Image Key > Echinodermata

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Echinoidea Pluteus Larva	Asteroidea Sea Stars

• Variable due to species and stage of larval development.

• Greek term for ‘spiny skin’.
• Approximately 7,000 living species.
• Includes starfish, brittle stars, sea urchins, sand dollars, sea cucumbers and feather stars.

• Worldwide.
• All depths.

• Meroplankton.
• Metamorphosis is rapid.