7 Facts About Octopus You Did Not Know
The octopuses are the strangest creatures we know. They have inspired many authors to represent monsters and villains, since their appearance is frightening in some occasions, and surely you would not like to meet a giant octopus while you go swimming in a lake, for example. And although they are not animals to fear or see octopuses attacking people every day, they are fascinating beings that are interesting to study.
So I propose to know these 7 curiosities about these cephalopods:
1. Reproduction is deadly for octopuses
The males introduce their spermatophores into a funnel that the females use to breathe and then the males will travel until they die. Females can produce up to 400 000 eggs, which they keep so faithfully that they even stop eating, but they do not die until their eggs flake and then their cells begin to die until their organs fail and die.
This result of evolution is very different from the way that vertebrates and mammals have followed, octopuses have been almost the same for millions of years and it seems that they will continue to be for millions more.
2. Octopuses belong to royalty
They do not use corona, but the octopuses have blue blood, because to survive in the ocean, they developed their blood based on copper and not in the iron, like the humans, what turns their blood to blue, by means of the protein hemocyanina, which is very useful for transporting oxygen in their bodies when the temperature is very low or there is little oxygen in the environment.
3. Ink is not just to escape
The ink that the octopuses shed when they are in danger is not only useful for hiding, but also can damage the enemies, since it contains a compound called tyrosinase, which in humans helps to control melanin, and the pigmentation of the skin. This substance may cause irritation to the eyes and divert the sense of taste and smell. Even octopuses need to be careful about this, as they may die from being exposed to their own ink for a long time.
4. The tentacles are part of their brain
Two-thirds of the octopus neurons are in their tentacles, so they can use them to open a sea shell while their bodies are occupied in something else. This also explains why the tentacles react even when they are separated from the body of the octopus.
5. Aristotle thought that octopuses were fools
Aristotle’s observations led him to conclude that octopuses were not very intelligent, but at present, we know that they are able to navigate mazes, solve problems and find solutions and even take things just for fun. In addition, they have eight arms covered with hundreds of suction cups that allow them to manipulate objects with precision. For example, they can open the shell of a clam, disassemble the filtration system of an aquarium or unscrew the lid of a boat.
6. Octopuses have three hearts
Returning to the difference that octopuses have with humans, we see that these have three hearts, two of which two are used to pump blood around the limbs, while the other is used for blood that runs through the organs.
7. Octopi are very old
The oldest known octopus fossil is 296 million years old, since the Carboniferous period. And although at first, the fossil does not seem to have a shape, the eight arms and their two eyes are the clear indicators that it was an octopus of the Pohlsepia family, which tells us that octopi have had this form since very early far away
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