See also:

• Science: Biology: Zoology: Echinodermata  (4)
• Science: Earth Sciences: Paleontology: Invertebrates: Echinoderms  (16)

• Classification of the Extant Echinodermata - Describes the taxonomic groupings and provides links to images of some taxa.
• Echinodermata - Characteristics and phylogeny of the spiny-skinned animals: sea urchins, starfish, and their allies.
• Echinoderms - Descriptions of the major species of Echinodermata (starfish, brittle star, sea urchin, feather star, sea cucumber) with illustrations and links to photos.
• The 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.
• Galaxy of Images: Starfish, Sea Lilies and Other Ecinoderms - Provides images from the printed books and manuscripts in the collections of the Smithsonian Institution Libraries.
• Gallery of Echinoderm Larvae - A collection of photographs of developing starfish and sea urchins with information about each.
• Introduction to the Echinodermata - Overview of the systematics and ecology of starfish, brittle stars, sea cucumbers, sea urchins, and sand dollars.
• Phylum Echinodermata - Some characteristics of the phylum that includes starfish, sea cucumbers, sea urchins, crinoids and brittle stars.
• Sea and Sky: Echinoderms - A brief description of the phylum followed by a long list of annotated photographs.