Echinoderm

Definitions

An animal of the phylum Echinodermata, comprising radially symmetric, spiny-skinned marine animals including seastars, sea urchins, sea cucumbers, crinoids, and sand dollars.

Equivalents

Examples

“Comparatively few additions were therefore made to the previously known Echinoderm-fauna of Brazil, only a single species, a Leptasterias, being with certainty new to science.”

“Many echinoderms are still bilateral as larvae, and swim⟳ freely in the ocean like⟳ baby fish⟳.”

CEFR level