Octopuses Are Smarter Than You Think

Octopuses are unlike any other animal on Earth. With three hearts, blue blood, eight arms, and a brain in each arm, they are the ocean's master problem-solvers — and one of the most alien-like creatures you'll ever encounter.

How Smart Are Octopuses?

Octopuses have demonstrated remarkable intelligence: they can open jars, solve mazes, use tools, recognize individual human faces, and even escape from aquariums. Each of their 8 arms has its own cluster of neurons — about ⅔ of an octopus's neurons are in its arms, not its brain. Each arm can act semi-independently.

How Do Octopuses Camouflage?

Octopuses are masters of disguise. They can change both their color and texture in under a second to match their surroundings — rocks, sand, coral, even a checkerboard pattern. They do this despite being colorblind! Scientists think they may detect color through their skin.

Do Octopuses Have Bones?

Octopuses have no bones at all — they are invertebrates. The only hard part of their body is a small beak (like a parrot's) used to bite prey. This allows them to squeeze through any opening as long as their beak fits — which can be surprisingly tiny.

How Big Are Octopuses?

Most octopuses are small — the common octopus has an arm span of about 3 feet. The giant Pacific octopus is the world's largest, with an arm span of up to 14 feet and a weight of 100+ pounds. The smallest is the star-sucker pygmy octopus at less than an inch long.

Amazing Octopus Facts

• Octopuses have 3 hearts — two pump blood to the gills, one pumps it to the body.
• Their blood is blue because it contains copper-based hemocyanin (not iron-based hemoglobin like ours).
• Octopuses can regrow a lost arm — it grows back fully over a few months.
• They squirt ink to confuse predators and escape.
• Most octopuses live only 1–2 years — they die shortly after reproducing.