Is a type of Echinoderms with two forms sessile and free-living. It is a marine species living in at a variety of depths. They have a long history being the first echinoderms to appear in the fossil record, the first evidence of them is during the early to middle Cambrian. They almost went extinct at the end of the Permian with only genus surviving to the Triassic. This one genus (Articula) eventually gave rise to the different forms we see today.
The mouth of the crinoids is located on the top using the feathery like tentacles to gather particles.
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