Other
Wet Web Media: Spiny Skinned Animals & Echinodermata
Site provides a general overview of echinoderms from the perspective of the marine aquarium enthusiast. Content includes a focus on physical characteristics, individual classes, and acquarium maintenance.
California Academy of Sciences
California Academy of Sciences: Echinoderm Webpage
Resource provides a brief overview of echinoderms. Includes pictures and links for more information.