What are examples of echnoderms?

Answer 1

Echinoderms are a diverse group of marine animals characterized by their radial symmetry and a water vascular system. Examples include starfish (or sea stars), sea urchins, sand dollars, and sea cucumbers. These creatures typically have a hard, calcareous exoskeleton and are found on the ocean floor in various habitats. Echinoderms play important roles in marine ecosystems, often serving as both predators and prey.