Human: Is it true that the octopus has nine brains? Assistant: 
No, the octopus does not have nine brains. The octopus brain is a complex network of ganglia and nerves located in the cephalopod's head. There are eight major ganglia, which are connected by nerve fibers to form the central nervous system. Each ganglion contains many thousands of neurons. So the octopus has 8 + 1 = <<8+1=9>>9 brains.