50 Amazing Facts About Octopuses You Probably Never Knew - Facts.net (2023)

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What is the weirdest octopus facts? ›

Octopuses also have three hearts: two just to pump blood through the gills and one more to circulate it to the organs. The circulating heart stops beating while an octopus swims, which explains why these cephalopods prefer crawling: Swimming exhausts them.

Octopuses have three hearts: one pumps blood around the body; the other two pump blood to the gills.

The human heart creates enough pressure to squirt blood 30 feet (9 m). Diet Coke was only invented in 1982. There are more than 1,700 references to gems and precious stones in the King James translation of the Bible. When snakes are born with two heads, they fight each other for food.

Are you still wondering why octopus blood is blue and what the three hearts do? Well, the blue blood is because the protein, haemocyanin, which carries oxygen around the octopus's body, contains copper rather than iron like we have in our own haemoglobin.

The giant Pacific octopus has three hearts, nine brains and blue blood, making reality stranger than fiction. A central brain controls the nervous system. In addition, there is a small brain in each of their eight arms — a cluster of nerve cells that biologists say controls movement.

Octopuses show lots of interesting features: they have a funnel for jet propulsion, adaptive skin for camouflage, an ink sack to fend off predators, three hearts and pulsating veins, big eyes, that are very similar to our human eyes, an elaborate brain, and prehensile arms with some mind of their own.

The octopus's arms are lined with hundreds of suckers, each of which can be moved independently thanks to a complex bundle of neurons that acts as a brain, letting the animal touch, smell, and manipulate objects. Octopuses can open clamshells, maneuver rocks—even dismantle the filtration systems of an aquarium tank.

According to the Biogeo Planet, the octopus is considered the most intelligent creature because it has 9 brains. But how does an octopus utilises 9 brains? Actually, each of its eight brains helps in controlling the arm movements.

Octopuses have three hearts, which is partly a consequence of having blue blood. Their two peripheral hearts pump blood through the gills, where it picks up oxygen. A central heart then circulates the oxygenated blood to the rest of the body to provide energy for organs and muscles.

Octopuses are solitary creatures that live alone in dens built from rocks, which the octopus moves into place using its powerful arms. Octopuses sometimes even fashion a rock “door” for their den that pulls closed when the octopus is safely inside. Giant Pacific octopuses can change color to blend in wherever they go!

Which animal has 25,000 teeth? ›

Snails have more teeth than any animal.

A snail's mouth is no larger than the head of a pin, but can have over 25,000 teeth (but these aren't like regular teeth, they are on its tongue).

The octopus would not be able to survive because that is the heart that provides the whole body with blood, which also helps deliver important oxygen around the body.

The seven-arm octopus is so named because in males, the hectocotylus (a specially modified arm used in egg fertilization) is coiled in a sac beneath the right eye. Due to this species' thick, gelatinous tissue, the arm is easily overlooked, giving the appearance of just seven arms.

Octopuses bleed blue, not red like humans. Their blood has a blue hue because the protein, hemocyanin, which carries oxygen in their bodies has copper rather than iron, which our (humans) hemoglobin possesses.

One group of segmented marine worms has pink blood. This is because the molecule that carries the oxygen is a type of blood pigment, known as hemerythrin, which is described as pink or purple.

What animal has purple blood? Peanut worms, which are a kind of marine worm, have purple blood. This is due to the presence of hemerythrin, an oxygen-binding protein.

There is a consensus in the field of animal sentience that octopuses are conscious beings — that they can feel pain and actively try to avoid it. Kristin Andrews and Frans de Waal posit in a new report published in the journal Science that many animals, including cephalopods such as octopuses, feel pain .

How smart is a octopus? ›

Yet octopuses are extremely intelligent, with a larger brain for their body size than all animals except birds and mammals. They are capable of high-order cognitive behaviors, including tool use and problem-solving, even figuring out how to unscrew jar lids to access food.

The third, or systemic heart, pumps the oxygenated blood around the body, fueling up the eight tentacles for whatever they and their suckers plan to do. Octopuses are quite active as cephalopods, and it's thought that the three hearts are necessary to maintain their power.

Using detailed measurements of spontaneous pain-associated behaviors and neural activity, Crook has identified three lines of evidence that all indicate octopuses are capable of feeling negative emotional states when confronted with pain.

The greater argonaut, Argonauta argo, has a reputation for being the world's weirdest octopus and indeed may be one of the most unusual and mysterious creatures to roam the ocean. Unlike its relatives that live on the seafloor, this octopus has a pelagic lifestyle, meaning that it lives in the open ocean.

Scientists who study them have shown, by testing them with mazes and problem solving experiments, that octopuses have both short-term and long-term memory. They have been trained to recognize different shapes and patterns and to open jars and boxes using tools. They can also mimic behaviors of other sea creatures.

They'll kill you dead. Blue-ringed octopuses deliver painless bites of paralyzing, deadly venom. Even humans aren't safe. The striking creatures are so good at what they do they're counted among the deadliest animals in the sea.

The most obvious thing octopuses can teach us relates to the evolution of their nervous system and problem solving skills. Octopuses are seemingly one of the most intelligent animals on our planet that are not mammals, and our closest ancestor is twice as ancient as the first dinosaurs.

Researchers from York University argue that octopuses, crabs, lobsters, crayfish, and other invertebrates are indeed sentient and can feel pain, anger, fear, and happiness.

Snails, spiders and octopi have something in common- they all have blue blood! We're not talking in the sense of royalty, these creatures literally have blue blood. So why is their blood blue and ours red? One of the purposes of blood is to carry oxygen around the body.

Intelligence. The octopus has a complex nervous system and is capable of learning and demonstrating memory.

Which animal has blue blood? ›

Can you guess what animals might have blue blood? Lobsters, crabs, pillbugs, shrimp, octopus, crayfish, scallops, barnacles, snails, small worms (except earthworms), clams, squid, slugs, mussels, horseshoe crabs, most spiders. None of these animals have backbones. Some of these animals are Mollusks, like the snails.

Which animal does have 32 hearts? To many, leeches are horrifying creatures. To a few, they're impressive and miraculous. They have 32 brains, 2 hearts, 300 teeth grouped in 3 jaws, five pairs of eyes...

Cecaelia – Half-human, half-octopus. The term was coined by fans in the late 2000s to describe characters such as Ursula from The Little Mermaid.

But if the octopus's systemic heart failed, it would be bad news. The octopus would not be able to survive because that is the heart that provides the whole body with blood, which also helps deliver important oxygen around the body.

It is hard to compare an octopus's intelligence directly with a 5th grader's; however, through an octopus's complex nervous system, ability to survive on their own and capability of creativity, they are proven to be smarter than a 5th grader.

They eat their arms when bored

Some even turn to a disturbing behavior known as autophagy, or eating their own appendages, in such non-stimulating environments.

Reproduction. Octopus vulgaris has individuals of both sexes. During mating, the male approaches the female, who fends him off for a while, but then accepts him. He sits next to her or mounts her, inserting the hectocotylus in her mantle cavity to pass the spermatophores.

5 – Great White Sharks

The Great White Shark is the largest predatory fish on earth, and it wields a lot of impressive teeth. Great White Sharks have around 3,000 teeth in their mouth at one time in multiple rows on their jaws.

But over the course of their lifetime, "estimates suggest some species of requiem sharks may grow and shed 30,000 teeth," Naylor told Live Science. That's threefold more than the great white (Carcharodon carcharias), which goes through about 10,000 during its lifetime.

Snails have more teeth than any other animal! Unlike other animals, snails' teeth are on their tongue! Different kinds of snails have different amounts of teeth but the garden snail has about 14,000 teeth!

Do all octopus have 9 brains? ›

Octopuses have 9 'brains'. One central brain is used for overall control. At the base of each arm is a group of nerve cells which can control each arm independently, acting as smaller brains. Why is octopus blood blue?

Each of the octopus's arms has a small cluster of nerve cells that controls movement, so the creature technically has eight independent mini-brains along with a larger central brain. Researchers have known about the octopus's unique biology for some time now.

Only a handful of people have spotted the dazzling blanket octopus in the wild, making it one of the rarest sights in the marine world. The technicolour marine mollusc was spotted last week by reef guide and marine biologist Jacinta Shackleton, off the coast of Lady Elliot Island in the Great Barrier Reef .