University of California
Ucmp: The Ophiuroidea
All about the Ophiuroidea. Includes a picture of the fossil along with the history.
University of California
Ucmp: From Starfish to Sea Cucumbers
A comprehensive site that looks at the different types of echinoderms, their life history and anatomy.
Other
Schayer's Brittle Star
Nice, brief overview of brittle stars, their form, color, habitat and distribution. Has a good picture.
Microscopy UK
Microscopy Uk: Growth of a Starfish
Describes the growth and development of a starfish.
California Academy of Sciences
California Academy of Sciences: Echinoderm Webpage
Resource provides a brief overview of echinoderms. Includes pictures and links for more information.
Other
Hawaii Coral Reef Network: Ophiuroidea, Brittle Stars
This page simply contains a picture of a spiny brittle star. A good example of this echinoderm.