Where do echinoderms get their names from?

Echinoderms get their names from the Greek Words "echinos," meaning "spiny" or "hedgehog," and "derma," meaning "skin." This refers to the characteristic spiny skin or external structures found in many echinoderm species, such as sea urchins and starfish. Their name reflects both their unique physical traits and their classification within the phylum Echinodermata.