5 Fun Facts About the Sperm Whale 1. They have the largest brain of any animal to have…

5 Fun Facts About the Sperm Whale 1. They have the largest brain of any animal to have ever lived on Earth. 2. They are the largest of the toothed whales. Adult males can weigh up to 80 tonnes, which is the equivalent of 800 people. 3. They have exceptionally large lung capacities. Sperm whales can stay under water for up to 90 minutes at a time. 4. Calves are enormous at birth. After a gestation period of over a year, females give birth to one calf which can be over 4 metres in length. 5. The longest recorded dive for a sperm whale was in excess of 2 hours.