The body structure of octopus is different from that of human beings and most other animals. For example, octopuses have three hearts and two memory systems. Their brains are also relatively developed, and researchers have studied their brain structure and found that octopuses have one main brain system and eight accessory brain systems. In addition, the nervous system of octopus is relatively developed. Although they are mollusks, the structure of their nervous system is similar to that of vertebrates.
These structures make octopuses relatively intelligent, so they can complete some activities that other animals consider more complex, such as in an experiment, octopuses can easily unscrew the cap of a bottle, and can escape from a small hole in a glass tank. Octopuses also use their intelligence during the mating season, for example, male octopuses may disguise themselves as female octopuses to deceive the same sex who is dangerous to them. In the face of danger, they will also use their intelligence to camouflage, such as sometimes they will get into the coconut shell to avoid the pursuit of the enemy.
As mentioned above, the IQ of an octopus is very high, and there are many manifestations of high IQ. Some researchers have studied their IQ and found that octopuses have at least the same IQ as two-year-old people. Of course, octopus itself is more varieties, their differences are relatively large, IQ will also have a relatively different, some octopus will be more intelligent. They can recognize themselves in the mirror, and clearly know their own abilities, can be used, this octopus's IQ can be equivalent to at least three or four years old human.
