- Who
- Sperm Whale
- What
- 9 kilogram(s)
- Where
- Unknown ()
- When
The largest brain of any animal belongs to the sperm whale (<em>Physeter macrocephalus</em> ) and weighs approximately 9 kg (19 lb 13 oz), which is six times heavier than a human brain. Nevertheless, it only equals 0.02 per cent of the whale’s total body weight.
