What are some examples of echinoderms?

Podia are small extensions of flesh which are operated by water pressure and muscles, and controlled by the nervous system of the echinoderm. The calcareous endoskeleton is made of many small plates that overlap under the skin, forming an armor and a structural form for the organisms. read more

Behavior of Echinoderms. Some echinoderms are carnivorous (for example starfish) others are detritus foragers (for example some sea cucumbers) or planktonic feeders (for example basket stars). Reproduction is carried out by the release of sperm and eggs into the water. read more