echinoderm material shellfish species echinoderm Echinodermata Klein, 1734 EC:No 1637/2001 ECH Echinoderm is the common name given to any member of the phylum *Echinodermata* of marine animals. The adults are recognizable by their (usually five-point) radial symmetry, and include such well-known animals as sea stars, sea urchins, sand dollars, and sea cucumbers, as well as the sea lilies or "stone lilies". [https://en.wikipedia.org/wiki/Echinoderm] Echinodermata echinodermata requires discussion