What are the blue ringed octopuses predotors?

Adults feed on crabs, clams, snails, small fish, and even other octopi. They use sharp parrot-like beaks to crush the shells of their prey. Newly hatched octopi are small enough to hide among plankton (small or microscopic organisms including algae and protozoa), so their food, equally small, consists of copepods and larval crabs.