The Atlantic Longarm Octopus lives in sand or mud burrows. Its body is approximately 3 inches in width but its arms, as its name implies, make it reach lengths of up to 14 inches. This benthic octopus lives in a burrow that is less than an inch in diameter. It is able to fit through any hole the size of its parrot-like beak (approx. the same size as its eye) for that is the only hard part in its body.