any of a class (Asteroidea) of echinoderms that have a body of usually five arms radially arranged about a central disk and feed largely on mollusks (such as oysters) —called also sea star
starfish
noun phrase(star-fish)
a starfish (Acanthaster planci) of the Pacific region that is covered with long spines and feeds on coral polyps sometimes causing destruction of coral reefs —called also crown-of-thorns starfish