The differences are as follows:
1, different families and genera: Octopus and squid are different families and genera. Squid belongs to the family Squid, while octopus belongs to the family Octopus. Squid belongs to the genus Squid and octopus belongs to the genus Octopus, which is quite different.
2. Different appearances: Octopus and squid have many differences in appearance characteristics. For example, their body shape, octopus's body is oval, relatively short, squid's body is relatively slender, generally long cone. For another example, the boundary between the head and body of octopus is not easy to distinguish, but the head and body of squid are more obvious.
3. Living environment is different: Octopus lives in deep water, and they adapt to high salinity environment, and may not adapt or even die under low salinity. But squid lives in the middle and upper layers of water, so its salinity is low.
4. Different foods: The main foods are different. Octopus mainly eats crustaceans, and sometimes it takes some plankton in the water as its own food. Squid mainly eats other small fish, such as sardines and whitebait.
What's the difference between octopus and squid?
First, the morphological characteristics are different.
1. Octopus: The head and trunk of an octopus are about 7-9.5 cm, with large compound eyes and eight retractable wrists. Each wrist has two rows of fleshy suckers. Octopus wrist is about 12 cm long, octopus wrist is about 48.5 cm long and octopus wrist is about 32.5 cm long.
2. Squid: There are a pair of developed gills around the mouth on both sides of the head. It often moves in the middle and upper layers of shallow water, and the vertical movement range is above 100 meters.
Second, the habitats are different.
1, Octopus: Octopus is a temperate mollusk, which lives underwater and adapts to the water temperature not lower than 7℃. The most suitable ratio of seawater is 1.05438+0, and it will die in a low salinity environment. Gravel zone is the best sediment in the sea area, and the water temperature is above 12℃, which can spawn every year. After hatching, the larvae are about 3 mm long and can grow up by feeding on plankton of large animals. After 45 days, when the total length is 10- 13 mm, they will settle on the seabed for benthic life.
2. Squid: It often moves in the middle and upper layers of shallow water, and its vertical range can reach 100 meters.
Third, different living habits.
1, Octopus: carnivorous, feeding on Claudiobranchia and Crustacea, and some species feed on plankton. This is not a question of whether it likes it or not, because stable structural myoglobin is a necessary condition for octopus to survive in the deep sea, and it competes with lobster for astaxanthin resources.
2. Squid: It feeds on krill, sardines, whitebait and small male fish. It is also the prey of fierce fish. Eggs are matured in batches and produced in batches. Eggs are wrapped in gelatinous egg sheaths, and each egg sheath contains several to hundreds of eggs according to different species. The amount of eggs laid by different species also varies greatly, ranging from several hundred to tens of thousands.
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The difference between octopus and squid
The difference between octopus and squid is as follows:
1, the appearance is different. Octopus and squid are quite different in appearance. Octopus has eight feet and many suckers on its feet, so people nicknamed it "Octopus". Squid is full, and obvious differences can be seen in the fresh freezer of the supermarket. Octopus is generally round-headed, while squid is narrow, close to a diamond, and most of them are white squid.
2. Different habits. Octopus is very sensitive to light. It usually lives on the dark bottom of the sea and comes out at night. When eating, he will suck minced meat through the sucker on his foot, which can be said to be a very fierce underwater overlord. In human records, large octopus can be tens of meters long and can be regarded as a dinosaur in the ocean. On the other hand, squid is more harmless, faster and more agile.
3, the taste is different. Squid is particularly chewy because of its regular swimming, strong muscles, tough taste, low fat content and a little cartilage. Therefore, squid is usually used as an ingredient in barbecue stalls. After fire processing, cumin pepper is sprinkled on it, which is crisp but not firewood. It is a good product for Xian Yi, young and old, and also a recommended product for people who want to lose weight. Octopus is usually soft, rich in protein and contains many minerals, so it is also a very good ingredient when making soup.
What's the difference between octopus and squid?
The difference between octopus and squid:
1. Octopus has a big compound eye with eight retractable wrists on its head, while squid has a big head with 10 feet, and the fleshy fin on its tail is triangular.
Octopus's body is oval or oval, which looks like a ball, while squid's body is long and narrow, which looks like a tube.
Octopus can be eaten raw or cooked before eating, and squid must be cooked before eating, because squid is cold.
4. Octopus lives underwater, and its water temperature should not be lower than 7℃. Squid often moves in the middle and upper layers of shallow water, and its vertical range can reach 100 meters.
Octopus behavior
Octopus sucks water into the mantle, breathes it and excretes it through a short funnel-shaped tube. Octopus mostly crawls on the seabed with suction cups, but when it is frightened, it will spray water from the body tube, and the sprayed water flow is strong, thus moving quickly in the opposite direction. In case of danger, ink-like substances will be sprayed out as a smoke screen. Some substances can paralyze the attacker's sensory organs.
In order to avoid being killed by predators, American scientists have discovered a "high IQ" octopus that can escape by walking on two feet in the Indian Ocean, in addition to the well-known mimicry camouflage and wrist protection technology.
Christine Huffard of the University of California, Berkeley and her team photographed an octopus named Maginettes in Indonesian tropical waters, which is about the size of an apple. When faced with danger or encountering divers, this octopus will bend and fold six of its eight claws upward to make a coconut shell, while the remaining two claws will stand on the bottom of the sea and secretly move backwards, just like a small coconut that moves, avoiding by retreating.
There is also an octopus, Akulitus, which is about the size of a walnut. It can also walk on two feet, but the other six feet extend outward to simulate the appearance of seaweed. The research team found that walking with two brachiopods is much faster than walking with eight brachiopods. The fastest speed of the former is about 0. 14 meters per second.
What's the difference between octopus and squid?
In daily life, grilled squid and octopus feet are common in barbecue stalls. In most barbecue stalls, octopus feet are sold in bundles, and the roasted flavor is overflowing. When a complete octopus is placed in front of us, it will be silly to tell the difference between octopus and squid. So what's the difference between octopus and squid?
1, with different shapes: the octopus body is short oval, cystic and wrinkle-free; The boundary between head and body is not obvious. Octopus has a head and body of 7-9.5 cm, a large compound eye and eight retractable wrists. Squid, on the other hand, has a slender body and a long cone with many brown spots on its surface, two feet more than octopus.
2, the living environment is different: Octopus is a temperate mollusk, living underwater, and the adapted water temperature cannot be lower than 7℃; The specific gravity of seawater 1.02 1, and the environment with low salinity will die. Squid is mainly distributed in tropical and temperate shallow seas, and often moves in the middle and upper layers of shallow seas, with a vertical range of more than 100 meters.
3. Different nutritional values: In addition to eating octopus, it also has the functions of enriching blood and benefiting qi, astringing and promoting granulation in medicine. Squid is rich in calcium, phosphorus and iron, which is beneficial to bone development and hematopoiesis and can effectively treat anemia. Squid is not only rich in protein and amino acids needed by human body, but also contains a lot of taurine, which can inhibit the cholesterol content in blood, relieve fatigue, restore vision and improve liver function.
That's why I introduce you to the difference between octopus and squid. I believe you know something about this, and I hope it will help you.