When hunting for tasty morsels like crabs and scallops, octopuses must watch out for predators at all times. That's why some of these brainy, eight-legged creatures bring along ready-made body ...

Octopuses have been discovered tip-toeing with coconut-shell halves suctioned to their undersides, then reassembling the halves and disappearing inside for protection or deception, a new study says.