The sperm whale, also known as the cachalot (8 letters), is a large marine mammal that belongs to the cetacean family. It is the largest of the toothed whales and can grow up to 20 meters in length. The sperm whale has a distinctive shape, with a large head and a narrow lower jaw. It feeds mainly on squid and fish, and its diet is supplemented by other marine creatures. Its name comes from the spermaceti organ located in its head, which produces a waxy substance used in the production of candles and lubricants. The sperm whale is found in all oceans, but it is most commonly seen in the tropical and temperate waters of the Atlantic, Pacific, and Indian Oceans.