What is an octopus




Mollusks constitute a family that includes a variety of living organisms, which represent a quarter of marine organisms on Earth, and the number of their species ranges between 50,000 and 200,000 species belonging to this family

including snails and marine mollusks such as octopuses, oysters, squid, bivalves, etc., and mollusks are found all over the world where they live in Habitats ranging from freshwater lakes and rivers to shallow coastal waters and even the deepest parts of the oceans, the vast majority of which live in bottom sediments,

some of which are carnivorous and some of which are herbivores, ranging in size from 0.04 inches to 4 feet, ranging in size from 0.04 inches to 4 feet.

The average lifespan of mollusks ranges from 3 to 500 years and more, and this article is concerned with talking about one of the marine mollusks, the octopus.



What is an octopus



octopus animal


 The octopus is a soft animal with eight limbs, and it belongs to the phylum Cephalopods.

The octopus is bilaterally symmetrical with two eyes and a beak. Its mouth is located in the central point of the eight limbs.

Its soft body can quickly change its shape, allowing the octopuses to squeeze through small gaps.

The octopus lives in Different areas of the ocean including coral reefs, surface waters and the sea floor, most species grow quickly and are often short-lived, and inkjet is one of the distinctive strategies of octopuses to defend itself against predators, and this article will explain the most important species of octopus.


 Octopus is distinguished from others in that it has eight arms, three hearts, and blue blood. It was named after the Greek word “októpus” which means “eight feet.”

You explore a food cave, and the other opens the oyster to eat. These arms contain two-thirds of the neurons, unlike the usual for these cells to be in the head.

It is the most mysterious creature in the sea.

There are many secrets and wonders of the octopus, some of which can be mentioned as follows:


  • He has an excellent sense of touch, as he has the ability to taste whatever food he touches with his arms.


  •  It has three hearts, one of which pumps blood to its organs, and two of them pump blood to its gills.


  •  His blood contains a copper-based protein called hemocyanin, which is why his blood is blue, not red.


  •  It sometimes interacts with other octopuses, but it is generally a solitary animal, and there are species that hunt at dawn and others at night.


  •  When it senses danger, it releases a dark liquid called “ink” towards the predator, thus impeding it until the octopus escapes.


  •  He can change his color to match the color of the place he is in. He can change its color to blue, gray, green, and others.


  •  It can also mimic the appearance of other dangerous animals such as fish and fish snakes.


  • They are carnivores, and their diet includes oysters, lobsters, fish, shrimp, and even sharks and birds.


  •  He dies shortly after mating, not exceeding a few months for the male, while the female guards the eggs and stops eating, and after the eggs hatch, cellular suicide occurs, her organs and tissues are torn and she dies.



What is an octopus



Octopus types


To clarify the types of octopuses, it should be noted that the animals that live in the sea or ocean vary in their characteristics and characteristics according to their types.

Each type can have main characteristics that distinguish it from others.

The most important types of octopuses can be explained as follows:


  • Atlantic octopus


The cephalopod octopus has a large bulbous head and eight long tentacles, and differs from all other octopus species due to its elaborate defensive skills in avoiding predators, and the most striking skill is its ability to hide from view in the blink of an eye, and this octopus contains a network of pigment cells inherent in its muscles Which can instantly change the color of its skin to match its surroundings, and if detected by a predator it spews a cloud of ink giving it time to escape.

The Atlantic octopus lives in shallow, temperate waters throughout the Atlantic Ocean, feeding on crabs, fish and crustaceans.



What is an octopus




  • blue ringed octopus


This octopus is so named because of the vibrant blue rings that appear on its body when excited.

It is the most deadly of all octopuses; Where it secretes two types of highly toxic poison, and it uses the first type of poison to catch hermit crabs, small fish and small shell fish, and uses the second and most toxic poison to defend itself against predators, and although it is very deadly, that octopus grows in size Only 2 inches long, the blue-ringed octopus has been found off the coast of Australia and Indonesia at depths of up to 165 feet.



  • coral octopus


It is one of the most active types of octopus; It is constantly on the move in search of food, and can blend in with the details of its environment to become invisible to the animals around it, and it feeds on shellfish, small fish and bivalves, and the size of the coral octopus body reaches half a foot, and its tentacles can extend for 2.5 feet, and their mating habits include in This type is a complex dance performed by the male to seduce the female, where the male turns his body in a dark color except for a place that lights it to attract the attention of the female.





What is an octopus



Octopus life cycle


After explaining the types of octopuses, it should be noted that each octopus possesses a number of individual gonads.

The testes are found in males and ovaries in females.

Some glands create hormones that cause the octopus to mature and stimulate the production of gametes.

The gland production may decrease due to environmental conditions such as temperature, light and nutrition, The life cycle of an octopus can be explained as follows:


  • When the octopus breeds, the male uses a special arm to move the sperm from the terminal organ of the reproductive system into the cavity of the female.


  •  The male clings to the top or side of the female or places himself next to her and picks up the sperm from the semen sac and inserts them into the female’s cavity until they are deposited in the correct place for her.


  • About forty days after mating, the male octopus delivers strings of small, fertilized eggs into the rocks in a crevice for the female to guard and care for for five months until hatching.


  • Immediately after this, the males become very old and die a few weeks after mating.


  • Then the small individuals grow and the arms and head of each develop on the ventral side.


  • They eventually settle to the ocean floor and all develop directly into adulthood.




What is an octopus



Octopus dangers


It seems that there are certain types of octopuses that tend to be violent and attack their surroundings, such as some types of octopuses in the tropics, they have a strong offensive tendency, and more about the dangers of the octopus can be explained in the following:


  • Sometimes an octopus is curious about its surroundings and satisfies that curiosity by stretching its arms around nearby animals or any human being within its control, when it may turn into an attack.


  • After mating, the male octopus becomes more aggressive and may begin to act abnormally, and sometimes large octopus species may attack a diver near them.


  • Several years ago, some scientists conducted a survey of Washington State divers in the United States and divers in Canada, and the goal was to document the number of times octopus attacks occur.


  • They contacted hundreds of divers, and the result was that a number of them were subjected to octopus attacks, some dangerous and some not.





What is an octopus



The most prominent differences between octopus and dolphin


After clarifying the dangers of the octopus, it should be clarified that marine animals also have cognitive skills that may differ from one animal to another and from one environment to another. The most prominent differences between octopuses and dolphins can be clarified as follows:


  • Octopuses do not have the same level of intelligence as dolphins, however, octopus species have very high locomotion capabilities that outperform any other animal, allowing different types of octopuses to learn by mistake and solve simple problems in their daily lives.


  • Unlike vertebrates, the motor skills of octopuses don’t seem to depend like dolphins on mental mapping of their bodies inside their brains.


  •  Octopuses have the remarkable ability to learn to solve a problem by observing another to solve it first as this ability is limited to mammals and birds.


  • While dolphins have increased cognitive abilities, dolphins can understand complex sentences as well as differentiate between directions.


  •  Dolphins also have a very complex language, and they use whistles in a very similar way to humans.

What is an octopus

0 تعليق

اترك تعليقاً

عنصر نائب للصورة الرمزية (Avatar)

لن يتم نشر عنوان بريدك الإلكتروني.