Sperm whales possess the most asymmetrical skull among all mammals.
They have the largest brain size of any living creature, weighing up to 4.2 kg.
Sperm whales have been sonar-tracked diving to depths exceeding 2,250 metres (1.4 miles).
The longest recorded dive for a sperm whale lasted over 2 hours.
Their common name originates from the large spermaceti organ located in their forehead region.
In the 18th and 19th centuries, sperm whales were commercially hunted for their spermaceti oil.
Sperm whales are famously louder than most other sounds in the ocean.