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The Most Interesting Facts About Cephalopod Intelligence

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List RulesVote up the coolest things you didn't already know about cephalopod (that means octopuses and stuff) intelligence.

Cephalopods are a group of invertebrates that includes squids, octopuses, and cuttlefish. Scientists are constantly learning new things about the intelligence of these animals. This list includes the most interesting things we know about cephalopod intelligence.

So how smart are cephalopods? Their intelligence is actually pretty difficult to assess since cephalopods display intelligence in ways that are very different from humans. But we'll give you the facts about the smartest cephalopods and let you decide how mind-blowing they are. Vote up the fact that you think is the coolest.
  • 1

    They Can See with Their Skin

    Scientists believe that cephalopods are colorblind - at least when they are looking with their eyes. Researchers recently discovered that a cuttlefish's skin contains gene sequences that are usually only found in the retina, the part of the eye that takes in light. This may explain why cephalopods can change color to match their surroundings, even though their eyes probably cannot see color.
  • 2

    They Can Solve Puzzles

    They Can Solve Puzzles
    Video: YouTube
    Octopuses can learn how to open jars to retrieve a meal. One octopus even learned how to open a child-proof jar. Octopuses are also notorious escape artists. An octopus named Inky escaped from his tank in the New Zealand National Aquarium and slithered into a drain pipe that led to the ocean.
  • 3

    Each Arm Can 'Think'

    Researchers once did an experiment where they cut off an octopus's arm (don't worry - the arm will grow back). The arm crawled on its own, grabbed a piece of food, and passed it to where the mouth would be if the arm was still attached to the body.
  • 4

    They Have Personalities

    This claim is controversial, but two scientists believe they saw evidence of different personalities in octopuses. When different octopuses encountered the same threat or food stimulus, they reacted in different ways - one might flee, one might investigate or fight. These different responses, the researchers say, are evidence of different personalities.