Echinodermata are so named owing to their spiny skin (from the Greek “echinos” meaning “spiny” and “dermos” meaning “skin”), and this phylum is a collection of about 7,000 described living species. ... Sea stars (Figure 1), sea cucumbers, sea urchins, sand dollars, and brittle stars are all examples of echinoderms.

Are echinoderms spiny skin?

Echinoderm, any of a variety of invertebrate marine animals belonging to the phylum Echinodermata, characterized by a hard, spiny covering or skin.

What animals name means spiny skin?

“Echino” means “spiny animal”, and “derm” means “skin”. Hence, these are the spiny-skin animals. The members of the phylum Echinodermata share several common features: 1.