All echinoderms are found:

A) in marine habitats.
B) in freshwater.
C) on land.
D) on the bottom of the ocean or lakes.
E) in shallow ocean waters.

Echinoderms

A phylum of marine animals that includes starfish, sea urchins, sea cucumbers, and sand dollars, characterized by radial symmetry and a unique water vascular system.

Marine Habitats

natural habitats found in the oceans and seas which are home to a diverse range of marine organisms and ecosystems.