Echinoderms are a phylum of animals with radial symmetry. They are non-chordates and they do not have a notochord or a central nervous system and their nervous system is made up of a nerve net.

Does starfish have notochord?

Echinoderms are marine invertebrates. They include sea stars, sand dollars, and feather stars. They have a spiny endoskeleton. ... Chordates include vertebrates and invertebrates that have a notochord.

What is the same characteristics of chordates and echinoderms?

Echinoderms possess a water-based circulatory system. The madreporite is the point of entry and exit for water for the water vascular system. The characteristic features of Chordata are a notochord, a dorsal hollow nerve cord, pharyngeal slits, and a post-anal tail.