Final answer:
Sea stars open the shells of their prey and digest them externally using their tube feet and everted stomachs.
Step-by-step explanation:
Sea stars, also known as starfish, have a unique feeding method that involves opening the shells of their prey and digesting them externally. They have rows of tube feet which they use to grip onto surfaces and prey. When a sea star finds a mollusk, like a clam, it uses its tube feet to pry open the shell. It then everts its stomach out of its mouth and into the shell, releasing digestive enzymes to break down the prey. The partially digested prey is then consumed by the sea star.