Incredible Octopus Facts

We all know that an octopus is an enigmatic, mysterious creature. But not everybody knows how awesome they really are. So, here are some facts for you:

Three hearts pump the blue, copper-based blood of octopuses.
Although an octopus is a mollusc, like clams and shells, it has lost its shell due to evolution.
At every depth in the ocean, octopuses may be found.
Octopuses are all poisonous. Their venom includes digestive enzymes that aid in food digestion.
Octopuses are able to recall and identify certain individuals.
All octopuses live rather brief lives. The octopus with the longest lifespan barely survives three to four years. A year to six months is the average lifespan of the smaller octopuses.
A blue-ringed octopus's poison may be lethal to humans.
Octopuses can alter their appearance in under 30 milliseconds. They alter their hue by enlarging their skin's chromatophores or small pigment sacs.
Hemocyanin, an oxygen-carrying pigment, gives octopuses' (and other mollusks') blood its distinctive blue color.
The octopus has two supplementary hearts because its oxygen-carrying pigment, hemocyanin, isn't as effective as hemoglobin.
Since the term "octopus" is Greek rather than Latin, the plural is not "octopi." Scientists call them octopuses even though the Greek word for "eight" is octopodes.
Otto, an octopus, short-circuited a light above his tank by hurling pebbles at it and dousing it with water.
Because octopuses are oviparous, they deposit eggs much as chickens do. In contrast, humans are viviparous, giving birth to completely formed children. Rattlesnakes are one type of ovoviviparous snake, meaning the female lays the eggs inside herself. They hatch and then give birth to live offspring.
Octopuses belong to a unique group of creatures that can utilize tools, along with dolphins, crows, and chimps.
An octopus has a sharp, hard beak on its mouth, which is located beneath its arms.
There are no known species of freshwater octopus.
The arms of an octopus can grow back. Unlike when a lizard loses its tail, it may recover without functional loss.
For mating, octopuses have a particular arm. During mating, the male octopus inserts sperm into the female using its "hectocotylus." They have been seen protecting this unique limb by keeping it close to the body when foraging.
The enormous Pacific octopus may swim up to 5,000 feet below the surface.
Researchers are considering renaming a little octopus found in the 1990s Opistoteuthis adorabilis because it is so adorable.
Octopuses can alter their texture in addition to their color.
There are no bones in octopuses. This implies that even huge octopuses can squeeze through coin-sized gaps.
When an octopus is born, it is roughly the size of a flea.
During Detroit Red Wings games, spectators participate in "The Legend of the Octopus," a custom in which they toss octopuses onto the ice. Even an octopus weighing 38 pounds was thrown in 1995.
A male octopus grows senile and eventually dies after mating.
The world's smartest invertebrate is said to be the octopus.
The biggest brain of any animal belongs to octopuses.
Some octopuses can run and walk on land. A veterinarian once compared pursuing an octopus on land to "chasing a cat."
The stinging tentacles of a Portuguese Man-O-War have been reported to be ripped off by octopuses and used as weapons.
Only marine octopuses have the ability to open jars.
Since the arms of an octopus contain over two-thirds of its neurons, even when detached from the body, they can still respond to stimuli and perform at a pretty high level.
The same light-sensitive proteins found in octopus eyes also exist in octopus skin. This implies that without the aid of the eyes or brain, its skin is capable of "seeing" and reacting to light.
The functions of octopus ink are to conceal the octopus and physically hurt its adversaries.
Not tentacles, but arms are the name for an octopus' appendages.
An octopus risks dying if it cannot escape its ink cloud.
The Pacific octopus, Enteroctopus defleini, is the biggest in the world. With an arm reach of up to 14 feet, it can weigh up to 33 pounds (15 kilograms) (4.3 m). It also has nine brains and three hearts.
Octopus wolfi, which is approximately 1 inch (2.5 cm) in length and weighs less than 0.035 oz, is the smallest species of octopus (1 g).