10 Animals with multiple brains.

 10 Animals with multiple brains.

1. Octopus Number of "brains": 9. Details: One central brain and a mini-brain in each of its 8 arms. Each arm can function semi-independently and process information on its own.

2. Leech Number of "brains": 32. Details: Possesses 32 ganglia (clusters of nerve cells), one in each body segment, functioning as mini-brains that control movement.

3. Earthworm Number of "brains": Around 20 pairs of ganglia. Details: It has a simple brain and multiple segmental ganglia that coordinate body movement and responses to the environment.

4. Cuttlefish Number of "brains": One main brain + complex neural networks in arms. Details: Like octopuses, their arms have significant autonomy due to rich neural innervation.

5. Squid Number of "brains": One central brain + giant axons in arms. Details: Advanced nervous system with decentralized control in arms for rapid movement and sensory input.

6. Starfish Number of "brains": No central brain, but 5 radial nerve rings. Details: Each arm has its own nerve ring that can coordinate movement independently.

7. Hydra Number of "brains": No brain, but a decentralized nerve net. Details: Neural activity is spread throughout its body, allowing it to respond to stimuli from any direction.

8. Sea Cucumber Number of "brains": No brain, but a nerve ring and radial nerves. Details: Uses a decentralized system to control body functions and movement.

9. Spider Number of "brains": One brain + cluster of ganglia. Details: While it has a central brain, some species have dense clusters of neurons in the legs for rapid movement control.

10. Cockroach Number of "brains": One brain + 3 ganglia in body. Details: It can survive for a while without its head because the ganglia in the thorax control basic functions like walking.

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