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Phylum Echinodermata - http://animaldiversity.ummz.umich.edu/echinodermata.html
Some characteristics of the phylum that includes starfish, sea cucumbers, sea urchins, crinoids and brittle stars. |
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Introduction to the Echinodermata - http://www.ucmp.berkeley.edu/echinodermata/echinodermata.html
Overview of the systematics and ecology of starfish, brittle stars, sea cucumbers, sea urchins, and sand dollars. |
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The Echinoid Directory - http://www.nhm.ac.uk/research-curation/projects/echinoid-directory/
Project based at the Natural History Museum, London, aiming to provide information for amateurs and the scientific community on this major group of marine invertebrates with a long fossil record. |
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Echinoderms - http://www.starfish.ch/reef/echinoderms.html
Descriptions of the major species of Echinodermata (starfish, brittle star, sea urchin, feather star, sea cucumber) with illustrations and links to photos. |
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Sea and Sky: Echinoderms - http://www.seasky.org/reeflife/sea2d.html
A brief description of the phylum followed by a long list of annotated photographs. |