Sperm whale is a giant among toothed whales, all other toothed whales are much inferior in size. Sperm whales grow all their lives, so the older the whale, the more they tend to be larger; While males are larger than females almost twice. The length of the males is 18-20 meters, the larger specimens are very rare. The weight of adult males is on average about 40 tons, but often large sperm whales weigh more, even up to 70 tons.
