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Ten Interesting Facts About Naughty Animals

The octopus has brain cells all over its body. The octopus is a mischievous and curious animal whose abilities may surprise you. Philosopher and scuba diver Peter Jeffrey Smith has reviewed the evolutionary journey of this sea creature in his audiobook.


The following are some of the things we have learned so far about these wonderful creatures.


1. They are clever but most of their brains are in their arms

The octopus' nervous system is very large, and a typical octopus contains about 500 million neurons or brain cells. That is, the total volume of their brain is as big as small animals like dogs.


But unlike dogs, humans, and other animals, most of their brain cells are found in their arms instead of their brain systems. An eight-armed octopus has an average of 10,000 neurons in one arm so that it can taste and feel.


2. Octopuses can be trained to retain memory

Research over the past 70 years has shown that octopuses can be trained to perform simple tasks. In a specific experiment, they can be taught to press a lever to be rewarded.


The octopus has also undergone vision tests in which it remembers a simple task and for this one eye is closed first and then the other. It was a long experiment, but the octopus performed better than other animals, such as pigeons.


3. They are very naughty

Three octopuses were included in the above lever experiment. They were named Albert, Bertrim and Charles. Albert and Bertram continued to succeed, but Charles sometimes failed to reach his goal and at one point broke his lever.


In addition, anyone who was experiencing it that day, Charles would hit him with streams of water.


Many aquariums have complaints about octopus mischief, such as striking water bulbs to turn off the lights in the room or short-circuiting through the water. At the University of Otago in New Zealand, it was so expensive that an octopus had to be released back into the sea.


4. Octopuses recognize different humans

An octopus in the same lab in New Zealand did not like a particular person on the lab staff. Apparently, there was no reason for that. Whenever the man passed by, he would throw about half a gallon of water on the man's back.


5. Octopus loves to play

Given his naughty nature, it is not surprising that he also enjoys playing. Some octopuses have been seen throwing empty bottles from one place to another in their tanks.


6. They join hands to have children

You can tell if an octopus is male or female by having grooves under its third arm.


Male octopuses extend this arm towards the female octopus and if they recognize it, a packet of sperm is placed in the arm of the female octopus. Female octopuses often retain sperm for a while before reaching their eggs.


7. They greet each other with a handshake

When octopuses are going somewhere, they often greet the sea crabs sitting on their burrows by waving their arms. Professor Steven Lancoist, who researches octopus behavior, believes it is a way for sea crabs to recognize each other.


8. Octopuses have multiple hearts

Octopuses have three hearts. Their blood is blue-green. The copper molecules in their blood carry oxygen just as the iron molecules in our blood do, which makes our blood red.


9. They can also be scary

Octopuses can change their color and shape. When a male octopus attacks another octopus, it darkens its color and spreads its arms in a way that makes it more visible.


10 There is also the advantage of not having a structure

Octopuses can change shape so much that they pass through holes as large as one eye. It is not uncommon for such a complex animal to have no structure or shell. This feature makes it difficult for them to protect themselves, but it also helps them to hide.

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