Question

What is an echinoderm?

Answer 1

Echinoderm is the common name given to any member of the phylum Echinodermata of marine animals. The adults are recognizable by their 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"

Answer 2

mark this as brainliest please
it refers to the plants or animals living under the sea like starfish sea cucumber