Four of the five answers are features of the echinoderms. Select the exception.

A) spiny skin
B) decentralized nervous system
C) radial symmetry
D) a water-vascular system
E) a mantle

Water-Vascular System

Of echinoderms, a system of fluid-filled tubes and tube feet that function in locomotion.

Echinoderms

A phylum of marine animals characterized by radial symmetry, a calcareous skeleton, and a water vascular system, includes starfish and sea urchins.

Radial Symmetry

A form of symmetry found in some organisms, where body parts or structures radiate from a central point, allowing for multiple planes of symmetry.