The term "Sea Lily" refers to a type of marine animal belonging to the class Crinoidea, which are echinoderms related to starfish and sea urchins. Sea lilies are characterized by their flower-like appearance, with a central body and long, feathery arms that extend outward. They are typically found attached to the ocean floor, where they filter feed on plankton and small particles in the water. Sea lilies have a long evolutionary history, dating back to the Cambrian period over 500 million years ago. They can be found in various ocean depths, from shallow waters to the deep sea. While many species are still alive today, some are considered extinct, and their fossilized remains provide valuable insights into ancient marine ecosystems.