A class of echinoderms that includes sea lilies and feather stars. Group of marine animals whose mouth are located on the upper surface of their body, which is surrounded with feeding arms. Some species have a stem used to attach the body to the substrate, while other spend part of their life attached to the ground and other part as a free-swimming individuals.

CRINOIDEA: "Class of Crinoidea was much more abundant and diverse in the past than it is today."

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