Because the body of the octopus is far more intelligent than other animals, and also weirder than other animals on the earth. Octopus is a common mollusk. Its appearance is different from many animals. Its 8 legs are connected to its head and it has a soft body. I think the first person who sees an octopus might really think of it as a strange animal. However, modern people's understanding of octopuses has improved a lot, and they also regard octopuses as food. However, after studying octopuses, scientists feel that octopuses are more like alien creatures. 1. Three hearts.

First of all, when you see an octopus, a soft animal, it is hard to believe that it has three hearts. Generally speaking, creatures on earth only have one heart, but it is really shocking that octopuses have three hearts. Among the three hearts of the octopus, one heart is used to supply blood to the whole body, and the other two hearts supply blood to the gills on both sides of the body. Although it is not known whether alien creatures have hearts, octopuses have two more hearts than earth creatures. It is not an exaggeration to call them alien creatures. 2. An efficient brain.

In addition, the octopus’s brain also surprises scientists. The octopus has two memory systems in its brain, which is also a feature that is different from most earth creatures. One memory system in the octopus brain is relatively normal and belongs to the brain, while the other memory system is a suction cup connected to the brain. This design is amazing. The octopus is definitely very sensitive to the outside world.

And there are more than 500 million neurons in the octopus brain, which shows that the octopus responds very quickly to the outside world. Five hundred million neurons transmit and feedback information. I think when the octopus is acting or thinking, the neurons in the brain are probably very busy. The efficient brain of the octopus combined with the large number of receptors on the body gives the octopus the ability to respond very quickly, and even to learn and think. Maybe the intelligence of octopuses is underestimated by humans. 3. Transform and change color.

In addition, another characteristic of octopus is that it can change its shape. The body of an octopus is soft and prone. Such a body will not be broken at all, and it will not even be easily injured in the face of attacks. Some octopuses, like clay, can change their shape and transform into sea snakes, jellyfish and other creatures, disguising themselves as poisonous creatures to escape predators and natural enemies. And color change is a small case for octopuses. Such an animal that can change both form and color fits well with people's imagination of alien creatures.

In general, the body of the octopus is more magical than humans imagine, so some scientists think it is an alien creature.