Sea+Lily

Class Crinoidea. They are the most primitive of all the living echinoderms. Sea Lilies attach permanently to their substrate by a stalk. Scientific name: Ptilocrinus The unattached end of a sea lily is called the crown. The aboral end of the crown attaches to the stalk and is supported by a stet of ossicles, called the calyx. Five arms are attached to the calyx. The mouth and anus open onto the upper(oral) surface. They are branched, supported by the ossicles, and they bear smaller branches(pinnules). The aboral end of the crown bears a ring of rootlike cirri, which cling when the animal is resting on a substrate. Pulling itself along the sea floor off the Grand Bahama Island.