Story: Starfish, sea urchins and other echinoderms

Underside of a starfish

Underside of a starfish

Starfish move about and grip objects with thousands of little tube feet underneath each arm. An internal hydraulic system pumps sea water into or out of each foot. A few tube feet are seen here protruding from the fringe of spines that runs along each arm. Each foot ends in a white sucker that can grip a surface.

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Te Ara - The Encyclopedia of New Zealand
Photograph by Melanie Lovell-Smith

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How to cite this page:

Maggy Wassilieff, 'Starfish, sea urchins and other echinoderms - Spiny-skinned animals', Te Ara - the Encyclopedia of New Zealand, (accessed 11 December 2023)

Story by Maggy Wassilieff, published 12 Jun 2006