Cuttlefish, also known as squid, cuttlefish, Uzi, cable fish and cuttlefish, belong to the same order as squid. Squid, also known as soft fish and squid. The head and trunk are longer and narrower than cuttlefish, especially the end of the trunk is very similar to the spear head of javelin, so it is called squid. Octopus, also known as octopus and octopus, belongs to a kind of octopus. Octopus has only eight wrists, four pairs of fleshy wrists on the head and feet, and the sucker on the wrist has no handle and toothed ring. The wrist is very long, 3-5 times as long as the trunk, like eight belts. If it has this feature, it can be recognized as an octopus. They all belong to cephalopods and mollusks, and they all have ink sacs. I haven't found out whether the ink in squid and octopus ink sac can be eaten or not. The main ingredient of cuttlefish ink is actually protein. Mixing the ink with chopped green onion eggs to make noodles is especially delicious. Italian special cuttlefish sauce noodles. How to distinguish squid from cuttlefish: Squid and cuttlefish have many similarities, such as the tentacles at the front end of the head, commonly known as "whiskers". Both of them have stone bone strips, funnels and excrement, also known as "cuttlebone". There is another place that is easy to distinguish between the two: press the middle of the carcass with your fingers. If it feels hard, it is squid; if it is soft, it is squid. Because squid fish have cuttlefish bones as hard as a ship, but squid only has a leaflike transparent film across its body, so it feels different. In addition, squid is generally slender, with a long diamond-shaped end and fleshy fins on both sides of the heir. When viewed upside down, they look like a "javelin head", while squid fish are slightly shoulder-width, which is different from other characteristics of squid. The front end of the squid has four pairs of wrists, one of which is particularly developed, with two rows of suction cups on the inside of the wrist, while the squid has a big head with a pair of eyes and five pairs of wrists, one of which is particularly long, and each wrist has four rows of suction cups. The trunk of squid is round and triangular. The cuttlefish, on the other hand, is oblate and oval, with internal fins on both sides and ink sacs and ink in the body, so the body surface is often inky. Distinguish three kinds of dried squid There are two kinds of dried squid in the market: long and oval. The long one is dried squid, and the oval one is dried squid, which is better than the oval one in quality. Good squid meat is thick, dry, reddish and mildew-free. The tender squid is yellowish in color, transparent and thin in skin. The old squid is purple in color and large in size. It is famous for its dry and delicate meat. It is a top-grade product with complete body, bright and clean, dry shrimp color and a layer of white powder on the skin. It is inferior to remove the powder film when it is wet, and inferior or deteriorated when it has spots and musty smell. Dried cuttlefish is a high-quality dried cuttlefish with complete shape, bright color, clean meat, flat and generous, reddish brown and translucent, and fragrant. The soft part has dark spots, the surface is pink and the back is dark red. Octopus dried octopus is a dried product made of octopus, octopus and octopus. Qualified dried octopus, with complete body shape, solid and fat body, stout claws, fresh persimmon red and brownish red body color, floating frost on the surface, clear body fragrance and light mouth. The quality of deep purple is very poor. Therapeutic Efficacy Squid fish is a low-calorie healthy weight-losing food, which has the functions of invigorating spleen, promoting diuresis, nourishing blood and nourishing yin, stopping bleeding and stopping leukorrhagia, suppressing acid, warming channels and dredging collaterals, and can be used for treating edema, stomachache, acid swallowing, anemia, dizziness, dampness arthralgia, beriberi, hemorrhoids and amenorrhea in women. Squid fish contains an amino acid, which can lower cholesterol and prevent arteriosclerosis. Eating squid and fish regularly has a certain auxiliary effect on improving immunity, preventing osteoporosis, treating fatigue and loss of appetite. Squid is a precious seafood with high nutritional value. It has the same nutritional function as brachiopod seafood such as cuttlefish and octopus, and is rich in protein, calcium, phosphorus and iron, which is very beneficial to bone development and hematopoiesis and can prevent anemia. Besides being rich in amino acids needed by protein and human body, it is also a low-calorie food containing a lot of taurine, which can inhibit the cholesterol content in blood, prevent adult diseases, relieve fatigue, restore vision and improve liver function. Polypeptide and trace elements such as selenium contained in it have antiviral and radioprotective effects. Chinese medicine believes that squid has the functions of nourishing yin, nourishing stomach, tonifying deficiency and moistening skin.