Octopus Intelligence — The Alien Among Us
Octopus vulgaris
Quick Fact
Two-thirds of an octopus's neurons are in its arms, not its brain — each arm can taste, touch, and make decisions independently.
About This Species
Octopuses have the largest brains of any invertebrate and display remarkable problem-solving abilities — opening jars, using tools, navigating mazes, and even playing. Two-thirds of an octopus's neurons are located in its arms rather than its central brain, giving each arm a degree of autonomous intelligence. Octopuses are also masters of camouflage, able to change colour, texture, and shape in an instant. They are short-lived — most species live only one to two years — yet pack an extraordinary amount of learning and behaviour into that time.
Why It Matters
Octopuses are a window into a completely different form of intelligence — one that evolved independently from vertebrate intelligence. Understanding them challenges our assumptions about what it means to be intelligent.
Transcript
The octopus is the closest thing to an alien intelligence we will ever encounter on this planet. Think about this: an octopus has nine brains. One central brain, and one in each of its eight arms. Each arm can act independently — tasting, touching, and making decisions without input from the central brain. They have three hearts and blue blood. Their eyes are more sophisticated than ours in some ways — they can detect polarised light that we can't see at all. Octopuses can solve puzzles, open jars, use tools, and recognise individual human faces. They've been observed playing — repeatedly releasing objects into a current and catching them again, for no apparent reason other than enjoyment. They can change colour and texture in milliseconds — not just for camouflage, but for communication. A single octopus can display dozens of distinct patterns. And yet they live for only one to two years. They're essentially born, grow to full intelligence, reproduce once, and die. The female dies guarding her eggs, never eating, until the last hatchling emerges. All of that intelligence. All of that complexity. In a lifespan shorter than a dog's first year. The octopus is a reminder that intelligence evolved independently in the ocean — and that we've barely begun to understand the minds that share this planet with us.