I tamed one of these of a 170lvl by feeding it raw meat and using a soothing balm. You had better use a soothing balm on high/med levels like mine but the taming process drops, so that's why you should use one. PRO TIP: Basilosauruses (Wild/Tamed) can automatically produce oil, so tame one! It will be really useful! Personally, I love these sea sausages, they are really useful and lovely!!!