crinoids
... that crinoids are closely related to sea urchins and starfish?
... that <b id="mwA2M"><a href="./Crinoid" id="mwA2Q" rel="mw:WikiLink" title="Crinoid">crinoids</a></b> <i id="mwA2U">(example pictured)</i> are closely related to <a href="./Sea_urchin" id="mwA2Y" rel="mw:WikiLink" title="Sea urchin">sea urchins</a> and <a href="./Starfish" id="mwA2c" rel="mw:WikiLink" title="Starfish">starfish</a>?