Basic Facts

How Many Hearts Does An Octopus Have?

Octopuses are fascinating animals. On this occasion we propose to clarify some of the doubts about them, as well as comment on some curiosities, myths and truths. Do you know how many hearts an octopus has?

Octopuses are cephalopod mollusks , also called octopods. They can measure from 2.5 cm and weigh less than a gram, to measure 4 meters – with their legs or arms open – and weigh 15 kilos.

The octopus is a symmetrically identical invertebrate animal despite having eight legs. It has a fang or tooth in the center of its body. Its eight legs come out from the bottom of its head.

This animal stands out for its enormous brain , it is the largest and most complex of the known invertebrates. The octopus also stands out for having more developed eyesight than the average of many animals. It is the sense that they use the most and are able to distinguish the polarization of light at meters depth.

The octopus is an animal that has a great capacity for learning and memory . In fact, it is said to be one of the most intelligent invertebrates known.

Great Sensory Capacity

Octopuses have developed great sensory capacity over the years. This allows them to have greater control of their environment and to learn from it.

As a curious fact, their sensory capacity is so great that octopuses are able to recognize their exact position with respect to the space in which they are. Cases have been seen of octopuses living in captivity that have learned to open food cans and even the fence of their aquarium.

This invertebrate feeds mainly on crustaceans and mollusks , also small fish and often carrion. It is an animal that can be found practically anywhere in the world, but especially on coral reefs .

Did you know that all species of octopus have three hearts ? If you did not know this, here we leave you the explanation and other curiosities of one of the most fascinating animals in the oceans.

How Many Hearts Does An Octopus Have: Curiosities

The octopus has three hearts that are located on its head. The octopus is a very agile animal that is in constant movement. This means that it needs more oxygen than other animals to pump blood throughout its body.

The functioning of these three hearts is complex. Two of its hearts are used to transport oxygen-depleted blood to its gills. The third heart uses it to pump blood with oxygen to the rest of your body.

These hearts are found inside his huge head. The use of his three hearts allows him greater stability and resistance in the water.

Octopuses modify the shape, color, and texture of their skin to camouflage themselves

The octopus is an animal that does not like to attack, it prefers to go unnoticed by camouflaging itself in the environment or fleeing from its attackers. He is able to control the appearance of his skin by contracting certain muscles, in this way his skin appears rougher and it is easy to get confused with the environment.

As for color , they have a small pigment sac in their epidermis that they can open and close at will to change their shape and color. It is probably one of the animals that best camouflages.

Is Octopus Blood Blue?

Against all odds, this is not a myth. The blood oxygenated by the heart of octopuses is blue. This is due to a change in the molecule that carries oxygen from octopuses throughout their bodies.

The molecule in charge of transporting oxygen in most animals is hemoglobin. In the case of octopuses it is hemocyanin. This carrier molecule contains a large amount of copper in its composition, which gives your blood that characteristic blue color.

Hemocyanin has another utility for octopuses. It is a substance that allows them to maintain their body temperature even in waters at sub-zero temperatures. 

Octopuses Use Different Color Pigments For Courtship

Octopuses court through a series of body movements. It is very common for them to use their camouflage ability to create iridescent reflections that attract females.

They are quite selective when choosing their mates and do not like their females to have relationships with other males , so we can say that they are quite jealous.

Octopuses Only Reproduce Once In Their Life

Female octopuses are only capable of laying eggs once in their life. However, the fact that they reproduce only once is also due to the males. Male octopuses usually die within a few weeks of having fertilized the female.

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