Features : long head that shares about a third of the total length ; a concave forehead ; flat chin stretching to the front ; the spermaceti case containing high fat content is located in the prolapsed occipital bone . besides making candles and ointments , this fat is good ingredient for making precision instrument lubricants 头部特别长，约占身体长度的三分之一，额部下方凹入，平扁的上颔由此向前伸出，头顶之外枕骨下垂构成鲸油器，内藏大量油脂，这种油脂除可制成腊烛和油膏之外，更可提炼成维护精密仪器的润滑剂。
