 The sperm whale can be found anywhere in the open ocean . Females and young males live together in groups while mature males 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 . 
