Generally speaking, cephalopods, especially octopus, are unmatched by most species in "coolness".

They are such unique animals that they are capable of doing more than people think.

Anatomy

Besides eight arms, octopus has three hearts, nine brains and noble blood.

Brain Wizards: Octopus has only 1/2 of the human brain, with about 5 million neurons. However, they have not only one mind, but a network of nine minds. Specifically, each tentacle has a brain and a main brain. The size of the octopus's main brain is not impressive, but it is far from useless. Octopus actually breathes wisdom ("head" literally means head! In the wild, they often use tools to avoid predation or help them hunt. In the aquarium, octopus is a notorious escape expert. An octopus escaped from his aquarium through the drain. He conveniently (or intentionally! ) I picked a pipe and went to the sea! Octopus can do all kinds of magical things, such as completing puzzles, opening doors and opening children's safety medicine bottles. Their intelligence reflects the intelligence of elephants, chimpanzees, dolphins, birds and human children.

Emotion or emotion: Few studies have recorded how emotional octopus is. Many owners claim that their octopus can recognize them. Some people say that their octopus likes to be touched and happily walks over to meet them, while others say that their octopus likes to meditate or be shy. Obviously, whenever they go out of town, their octopus will block the filter. Puppy-like behavior, including pupil dilation, has been recorded in several YouTube videos. Because they are lonely animals in the wild, there is not enough information to confidently say that they have emotional ability. However, octopus shows many self-comforting behaviors, such as favoring injured limbs and grooming. They also show emotional stress through destructive behaviors. Like other intelligent animals, they live longer in the wild than in captivity. However, recent studies have concluded that octopuses do have pain receptors, which means that they can feel pain and pain.

Big heart: Octopus has three hearts. Two of them are used to pump blood into the gills, and the third one is responsible for the circulation of other parts of the body.

blue blood: octopus's blood is also very attractive. Human blood contains hemoglobin, while octopus blood uses hemocyanin to maintain oxygen circulation, even in very low temperature and oxygen-deficient water. Their blood is blue because of its copper base.

Boneless creatures: Although people think that their ancestors had shells, most octopus today have no internal skeletal system. Instead, the hard structure becomes a body composed of 9% muscles, and even the largest octopus can twist itself through a small gap in its volume.

Defense mechanism

Octopus has impressive defense ability and has different weapons in almost any situation.

Ink: If the octopus encounters a threat that is too big to be subdued, it will shoot black ink in the direction of the attacker to buy itself time to escape.

Camouflage: Like other cephalopods, octopus can change color at will. In fact, octopuses can easily ambush their prey with it. They are such skilled pretenders that they can even change the texture of their skin to adapt to their environment. In addition, octopus will imitate the colors and patterns of dangerous animals and deceive predators into believing that octopus is not them.

Venom: Uninformed beach tourists often find a cute little octopus trapped in a tidal pool or washed ashore, so they decide to help this little one. Although rescuers have good intentions, after trying to bring octopus back to the sea, they are often hospitalized, sometimes for several days. Putting the octopus back to its original place is a kind thing, but don't do it with your bare hands. Only one kind of octopus poses a real threat to human life, and that is the blue-ringed octopus, but all octopus are poisonous. Octopus paralyzes its prey with poisonous protein. It is especially useful for crustaceans. Any future octopus rescuer should remember to be careful and use buckets as a means of transportation.