State of massachusetts to spain in the north and from southern brazil to northern angola in the south including the mediterranean sea gulf of mexico and caribbean sea. In the atlantic ocean it is found from the us. Mantle length ml is the standard size measure for coleoid cephalopods shell diameter being more common for nautiluses and is almost universally reported in the scientific literaturethe mantle is the cephalopods body lying posterior to the head and enclosing the visceral mass and mantle cavity the latter being used for locomotion by jet propulsion.