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.
CK-12 Foundation
Ck 12: Life Science: Types of Echinoderms
[Free Registration/Login may be required to access all resource tools.] Birds aren't the only creatures that have feathers. One type of echinoderm, the feather star, has feathery arms. These animals don't fly or even move much at all....