The document describes an octopus. It lives in oceans around the world, especially the Arctic Ocean, hiding in holes and crevices in rocks and coral. As a carnivore, it eats clams and scallops. While some octopus species are large, others are only a few centimeters across. The blue-ringed octopus has enough poison to kill humans. It has a large head, big eyes, and distinctive arms, resembling another sea creature.