The sperm whale is the largest toothed whale. Males reach 60 feet (17 m) in length and the smaller females are 37 feet (12 m). They are dark gray in color, have.
Sperm whales' heads are filled with a mysterious substance called spermaceti. Scientists have yet to understand its function, but believe it may help the animal.
The sperm whale (Physeter macrocephalus) or cachalot /ˈkæʃəˌlɒt, ˈkæʃəˌloʊ/ is the .. Main article: Whale sound . the sperm whale migrated through evolution to their current functions, the left nostril becoming the blowhole and the right.