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. The zebra shark occurs in the tropical waters of the indo pacific region from south africa to the red sea and the persian gulf including madagascar and the maldives to india and southeast asia including indonesia the philippines and palau northward to taiwan and japan eastward to new caledonia and tonga and southward to northern australia. Sundays report high overcast with humidly and a light south wind seas generally good.