Despite their portrayal as monsters in undersea horror movies and the nickname devilfish, giant octopi (Octopus dofleini) are shy creatures that present no danger to humans. But they really are big. The arm span of the largest adult giant octopus ever recorded was 32 feet and weighed 300 pounds, but even their average 15 feet arm span and 100 pound weight are impressive. Giant octopi are found from the coast of Asia around the Pacific rim to northern California. Like all octopi, they have eight arms for sensing and seizing their prey, which includes shrimps, crabs, scallops, clams, abalone, moon snails, small octopuses, and fish. They live for only 3 to 5 years, hunt nocturnally, and retreat to dens in rocks and debris during sunlit hours. At the entrance to a den there will be a collection of bones, spines, and shells left over from previous meals, known as an octopus's garden.