 The sperm whale 's unique body is unlikely to be confused with any other species . The sperm whale 's distinctive shape comes from its very large , block @-@ shaped head , which can be one @-@ quarter to one @-@ third of the animal 's length . The S @-@ shaped blowhole is located very close to the front of the head and shifted to the whale 's left . This gives rise to a distinctive bushy , forward @-@ angled spray . 
