<P> Physeter catodon Linnaeus, 1758 Physeter australasianus Desmoulins, 1822 </P> <P> The sperm whale (Physeter macrocephalus) or cachalot / ˈkæʃəˌlɒt, ˈkæʃəˌloʊ / is the largest of the toothed whales and the largest toothed predator . It is the only living member of genus Physeter and one of three extant species in the sperm whale family, along with the pygmy sperm whale and dwarf sperm whale of the genus Kogia . </P> <P> The sperm whale is a pelagic mammal with a worldwide range, and will migrate seasonally for feeding and breeding . Females and young males live together in groups, while mature males (bulls) live solitary lives outside of the mating season . The females cooperate to protect and nurse their young . Females give birth every four to twenty years, and care for the calves for more than a decade . A mature sperm whale has few natural predators, although calves and weakened adults are sometimes killed by pods of orcas (killer whales). </P> <P> Mature males average 16 metres (52 ft) in length but some may reach 20.5 metres (67 ft), with the head representing up to one - third of the animal's length . Plunging to 2,250 metres (7,382 ft), it is the second deepest diving mammal, following only the Cuvier's beaked whale . </P>

What ocean zone does the sperm whale live in