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.
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.