echinoderm picture

Isorophus cincinnatiensis - notice the five ambulacral "arms" in the center. The creatures mouth is at the center of these arms. Also, notice the anal pyramid (the small circle near the bottom between two arms). This edrioasteroid is about the size of a dime.
Phylum Echinodermata
Class Crinoidea

Photography by Michael D. Vanden Berg

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