What kind of animal is the ancestor of the octopus and what kind of animal does the octopus belong t

Octopusidae.

Octopus, also known as octopus, is a mollusk that evolved from cephalopod mollusks. The body is generally very small, and the eight tentacles are thin and long, so it is also called "octopus".

Octopuses, like the familiar cuttlefish, are not fish, they are both mollusks. What is unique is that the octopus has eight legs as long as a strap and floats in the water in a zigzag, so the octopus is also called "eight-ribbon fish".

The octopus is the "hegemon" of the ocean, and it is extremely powerful, cruel, aggressive, and resourceful, and many marine animals are afraid of it. The octopus is a sensitive animal, and its nervous system is the most complex and advanced among invertebrates, including the central nervous system and peripheral nerves, and the auditory, olfactory and visual nerves are divided into the cranial ganglia.

The most developed of its sensory organs is the eye, which is not only large, but also swollen and motionless. The structure of the eye is complex, with a cornea in front and a sclera around it, as well as a well-developed lens comparable to that of vertebrates. In addition, there is a dimple in the back of the eye**, which is used for the sense of smell.

It is a temperate mollusk, living underwater, adapting to the water temperature can not be lower than 7, the specific gravity of seawater is the most suitable, and the environment with low salinity will die.

It can feed on large animal plankton and grow. It is widely distributed in tropical and temperate seas of the world's oceans. It is the common name for 252 species of marine mollusks in 26 genera of the octopus family.

Not only can the octopus spray ink six times in a row, but it is also capable of changing its color and structure like the most nimble chameleon, becoming like a stone covered in algae, and then suddenly pounce on its prey, who simply doesn't have time to realize what's happening.

Octopuses crawl through reefs, rock crevices and seabeds using their nimble wrists and feet, sometimes camouflaging themselves as a bunch of coral, sometimes as a pile of glittering gravel. In 1998, Mark Norman of the University of Melbourne in Australia discovered an octopus in estuarine waters near the Indonesian island of Sulawesi that can quickly mimic poisonous creatures such as sea snakes, lionfish and jellyfish to avoid attack.

The octopus is also called an octopus, but it is not a fish, but a mollusk. All fish are vertebrates, and they all swim with fins, have true upper and lower jaws, and breathe with gills. But octopuses don't have these conditions.

Octopuses belong to the molluscs. Octopus is the common name of 252 species of marine mollusks in 26 genera of the Octopus family, and is the largest family of cephalopods, which can be divided into the subfamily of deep-sea myriapods, the subfamily of Aerdoudae, the subfamily of cereals and the subfamily of cephalopods. The octopus has an ovoid or oval body, strong muscles, a narrow opening in the mantle cavity, and generally no water holes on the body surface.

Wrist suction cups 1 or 2 rows. The third carpal on the left or right side of the male is stemmed, the ventral margin of the carpal has a seminal groove, the end has a spoon-like tongue, and the stemmed carpal cannot be severed. Funnel jacket lock degraded.

1 pair of vestigial needle-like inner shells or no inner shells. If there is a toothed tongue, the teeth on the side of the tooth tongue are usually single-cuspid. The stomach and cecum are located at the back of the digestive glands.

Octopus is a temperate mollusk, living underwater, adapting to the water temperature can not be lower than 7, the proportion of seawater is the most suitable, and the environment with low salinity will die. The bottom of the sea area is best sandy and gravelly, the water temperature can spawn at more than 12 years, the larvae are about 3 mm long after hatching, they can feed on large animal plankton and grow, and after 45 days, when the total length is 10 to 13 mm, they settle on the bottom of the sea camp benthic life, and if there is no ceramic clay pot conch shell can be used as a living room, they will build their own houses.

1. Octopuses are mollusks and have no bones (all bones are degenerate).

2. The octopus is a cephalopod with a total of 8 brachiopods and legs, which grow on the head.

3. Octopuses are the most intelligent of all invertebrates.

4. Octopus** contains highly developed pigment-containing cells, which can change body color very quickly. The body color of the octopus can be used as a protective color, and it is said that it can also reflect the mood of the octopus.

5. The octopus relies on inhaling water into the mantle membrane and expelling the water from the body through a short funnel-shaped body tube for respiration. When the octopus is frightened, it will spew out a large stream of water from its body tube, and quickly move in the opposite direction by means of water jet, so as to avoid danger.

6. When the octopus encounters danger, it will spray an ink-like substance as a smoke screen to avoid danger.

<> "Octopus is widely distributed in tropical and temperate seas around the world, and is distributed in the north and south coasts of China, with about 650 species and great differences in size. Octopuses are very intelligent and can even use tools, scientists have found that octopuses have a set of genes similar to humans through genetic decoding, which explains why octopuses have the ability to learn, let's take a look at what kind of animals the octopus is!

What kind of animal is an octopus.

Octopuses are marine mollusks. Octopus belongs to the general name of the octopus of the octopus family of the mollusk phylum Cephalopod, because it has eight wrists on its head, and the wrists are connected by membranes, the length is different, and the wrists have two rows of sessile suction cups, so it is called "eight-wristed class", which does not belong to fish.

What food do octopuses eat?

Octopuses are carnivorous marine mollusks that feed on gills and crustaceans (shrimp, crabs, etc.), with some species eating plankton. It's not a question of whether it likes it or not, because stable structural myoglobin is a necessary condition for octopuses to survive in the deep sea, and giant octopuses do not hesitate to fight to the death with sperm whales, just to compete for astaxanthin resources, astaxanthin is the strongest antioxidant, and it is a necessary condition to ensure that the structure of myoglobin is stable and not oxidized.

Do octopuses have a high IQ?

Octopuses have the ability to "think conceptually" and solve complex problems on their own, which gives them the ability to walk on two legs. After further research, scientists also found that octopuses live alone since birth, and baby octopuses only need a very short time to learn the skills they should have, and unlike most animals, learning is not based on the teaching of elders, although their parents have inherited some abilities from them, but small octopuses develop their own ability to solve new problems by learning to hunt, camouflage, and find better shelter on their own. At the same time, the eight-legged species was able to carry coconut shells and use them as their own armor, the first example of invertebrate use of tools.

Part of the expertise** network.