Satisfactory answer rating: 0% The essential difference is: squid is a shellfish and octopus is a mollusk. Report Respondent's Supplement 2009-06-29 21:24 Squid Squid, although it is customary to call them fish, is actually not a fish, but a mollusk living in the ocean. In taxonomy, squids belong to the phylum Mollusca - Cephalopoda - Dibranchia - Decabrachia. The squid has two gills as respiratory organs; the body is divided into a head, a very short neck and a trunk. There are a pair of well-developed eyes on both sides of the head and arms and legs surrounding the mouth. There are two types of squid currently seen in the market: one is a squid with a fatter trunk, and its name is "squid"; the other is a squid with a slender trunk, and its name is "soft fish". The common name of soft fish is "little tube boy". Report Respondent's Supplement 2009-06-29 21:31 Octopus Like squid, octopus is also a cephalopod because its legs are also on the top of its head. However, it only has eight legs and does not have the special claws used to catch food like squid. Its eight legs are very long, like eight belts, so fishermen call it "Eight Hairtail Fish". Octopuses are also very ferocious animals. It has large suction cups with strong suction powers on its legs. If we catch a small octopus and hold it in our hand, it will immediately suck our hand with its suction cup, and it will be very laborious to remove it! Octopuses also have ink sacs in their bodies, and the ink they contain also contains toxins, which can be used not only to defend against enemies, but also to attack them. A very interesting fact is that when the octopus is resting, it does not rest with its whole body, but leaves one or two long legs on duty, constantly turning. Although its body and other feet are slow, if its duty feet are slightly touched, the octopus will immediately jump up and release thick ink. , hide yourself. Because the octopus has powerful legs and suckers, as well as good defense tools, animals of the same size as it in the ocean will be harmed by it. Even the largest and best-equipped crayfish, although about the size of an octopus, inevitably fall victim to it. The meat of octopus is very plump and it is also an excellent seafood.

Squids are invertebrate molluscs. Among marine creatures, the squid has the fastest swimming speed. It swims very fast. Unlike ordinary fish that swim by their fins, they rely on the reaction force of the water spray from the funnel tube on their belly to move forward quickly. Its spraying ability is like a rocket launch. Likewise, it can make squid jump from the deep sea and jump out of the water to a height of 7 to 10 meters. The body of the squid is like a cannonball and can fly about 50 meters in the air. The speed of squid swimming in sea water can usually reach more than 15 meters per second, and the maximum speed can reach 150 kilometers per hour. The swordfish, known as the swimming speed champion among fishes, has a speed of only 110 kilometers per hour, so it has no choice but to lag behind. Of all the squid in the world, the baby squid is the smallest. Its length is no more than 1.5 centimeters, about the same size as a peanut, and its weight is only 0.1 grams. This ultra-small squid lives in aquatic plants in the shallow waters of the Sea of ??Japan. It looks very similar to ordinary squid, except that it has an extra suction cup on its back, which can be attached to the aquatic plants to prevent it from being washed away by the sea water. It usually rests on the water plants, but once it finds prey, it suddenly attacks. After eating, it returns to the water plants to rest quietly, waiting for the next prey. The largest squid in the world is the giant squid. They generally live in the depths of the ocean, resting in the deep sea during the day and swimming to shallow seas at night to feed. In the kingdom of squid, there is also a very small firefly squid. It is a luminous creature with three light emitters on its belly, and some have one around its eyes. The light it emits can illuminate up to 30 cm away. When it encounters a natural enemy, it emits a strong light, scaring the natural enemy into fleeing in panic. It can be said that the whole body of squid is a treasure. It is delicious and has good medicinal effects. What is commendable is that it combines the gourmet function of food with the medical and health care function. According to the traditional concept of traditional Chinese medicine in my country, there are two types of treatment: medication and diet therapy. Diet therapy combines the gastronomic function and medicinal value of food. It is not only in line with traditional medical concepts, but also close to the concept of modern health food. . There are many ways to eat squid, such as cold salad, stir-fried shredded mullet, fried mullet rolls, braised mullet soup, squid fillets, etc. Especially braised mullet meat with fresh garlic moss is extremely delicious. Its eggs are roasted into isinglass and then cooked by chefs, becoming a delicacy famous both at home and abroad. In addition, the viscera of cuttlefish can be used to extract visceral oil, which is a good raw material for tanning. Its eyes can be made into eyeball glue, which is an excellent glue and agent. Cuttlefish and cuttlefish are cuttlefish. Squid and cuttlefish are very similar, but generally speaking, the squid you see is much larger than the cuttlefish, and there is a lot of ink on the fresh cuttlefish. The body of the squid is pink and strong, while the cuttlefish is whiter.

The most obvious difference between octopus and squid is that the squid has a small piece of fin-like thing on each side of its head to maintain balance. The head of a squid is much larger in proportion to its body than that of an octopus. In addition, there is a small amount of cartilage in the body of the squid, so it is more shapely than the octopus, and has a relatively fixed shape in comparison.

Octopus is octopus, and cuttlefish is squid, they are just aliases.

I think the problem with the guys upstairs is that it is impossible for king squid to go to shallow seas to feed. The giant squid found in the world all floated up after death.

It is adapted to the dark world of the deep sea. It has eyes one foot in diameter and its pupils cannot be adjusted. Once it rises into the shallow sea, the intense light will instantly blind it.

In addition, because it lives in the deep sea, its body produces an amine substance in order to adapt to the huge water pressure and stores it in its muscles. If the pressure changes too much, it will be released. But this substance is poisonous, so once the king squid floats up, it will definitely die. The skin of the king squid can glow, mainly for hunting prey, but the light is not particularly bright, and I can't stand it if it is bright.

Because of their huge size and depth, no creature other than sperm whales can threaten their survival