Most sea stars also have the remarkable ability to consume prey outside their bodies. Using tiny, suction-cupped tube feet, they pry open clams or oysters, and their sack-like cardiac stomach emerges from their mouth and oozes inside the shell
Starfish have a feeding method that is unlike any other. To eat, the echinoderm ejects its stomach from its own body — placing it over the digestible parts of its prey, typically a mussel or clam.
Explanation: Waves move in that kind of up and down motion, a circuit is a straight line with energy flowing through it, a magnet is a pulling effect and a prism is a shape, not necessarily a motion.
