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. As a general rule a person in this position is passionate about and. This is a list of tweenies episodestweenies is a television programme aimed at young children formerly broadcast on the bbcs cbbc strand from 1999 until 2002 then the cbeebies channel from 2002 until 2016.