Crinoids, also known as sea lilies, are members of the Echinodermata phylum along with starfish and sea urchins. Our Crinoid plate fossil is from Morocco, where we have an old friend there who constantly searches them out. They have the appearance of graceful underwater flowers. They are among the oldest fossils known in the world, dating all the way back to the Ordovician period, or 450 million years ago. The stand is not included in the price.