CATDOLL : CATDOLL: What is the difference between cuttlefish and squid?

There are two types of squids in the market: one is the squid with a fatter body, which is called "squid"; the other is the squid with a slender body, which is called "squid". The small squid is commonly called "small tube". Loliginidae (squid): A family of cephalopods, commonly known as squid. Mainly distributed in tropical and temperate shallow seas, there are about 50 species. They often move in the middle and upper layers of shallow seas, and can move vertically up to more than 100 meters. They feed on krill, sardines, silversides, small male fish, etc., and are themselves preyed by fierce early hidden fish. The eggs mature and are laid in batches. The eggs are wrapped in a gelatinous egg sheath. Each egg sheath contains a few to hundreds of eggs depending on the species. The egg laying amount of different species varies greatly, from hundreds to tens of thousands. Chinese squid (commonly known as "squid") has tender meat. Its dried product is called "dried squid". It has excellent meat quality and is well-known in the domestic and foreign seafood markets. It produces 40,000 to 50,000 tons annually. The main fishing grounds are in the coastal waters of southern Fujian, Taiwan, Guangdong and Guangxi in China, as well as the coastal waters of the Philippines, Vietnam and Thailand. Squid is commonly known as cuttlefish. Its classification status is the phylum Mollusca Cephalopoda Dibranchia Decapoda The body can be divided into three parts: head, foot and trunk. The trunk is equivalent to the visceral mass, covered with a muscular mantle and has a calcareous inner shell. ◆ The head is located at the front end of the body and is spherical. Its top is the mouth, surrounded by oral membranes, and there are 5 pairs of arms on the outside. There is a pair of well-developed eyes on both sides of the head, with a complex structure. There is an oval pit below the eye, called the olfactory pit, which is the olfactory organ, equivalent to the olfactory detector of gastropods, and is a chemical receptor. ◆ The foot has been specialized into arms and funnels. There are 10 arms, arranged symmetrically on both sides. The first pair is in the middle of the back, followed by the 2nd to 5th pairs toward the ventral side. The 4th pair of arms is particularly long, with a tongue-like swelling at the end, called the tentacular arm, which can be used for hunting and can be retracted into the tentacular sac. The inner side of each arm has 4 rows of suckers with handles, and the tentacles only have 10 rows of small suckers on the inner side of the tongue-like part at the end, which is called the tentacular club. The middle sucker of the 5th arm on the left side of the male is degenerate and specialized into a reproductive arm or a hectocotylized arm. It can transport spermatophores into the female body and serve as a copulatory organ. The male and female can be distinguished based on the hectocotylized arms. The funnel is located on the ventral side of the head, with a wide base hidden in the mantle cavity. There is an elliptical cartilage depression on both sides of the ventral surface called an adhering groove. It matches the adhering ridges on the ventral side of the mantle, like a snap button, called an adhering apparatus, which can control the opening and closing of the mantle hole. The front end of the funnel is a simple water pipe, exposed outside the mantle, and there is a tongue flap in the water pipe to prevent water backflow. When the adhering apparatus is opened, the muscular mantle expands, and seawater flows into the mantle cavity from the mantle hole; when the adhering apparatus is tightened, the mantle hole is closed, the mantle contracts, and pressurized water is ejected from the water pipe of the funnel. This is the power of the squid's movement. ◆The trunk is bag-shaped, slightly flattened dorsally and ventrally, and located behind the head. It is covered with a very developed muscular mantle, and the internal organs are inside it. There are fins on both sides of the trunk, which are separated at the end of the trunk and play a balancing role in swimming. Because there are pigment cells under the epithelium on the dorsal side of the trunk, the color depth of the skin can be changed. The body position of the squid is based on its living state in the water. The head end is the front, the trunk end is the back, the side with the funnel is the abdomen, and the opposite side is the back. However, according to the comparison between the body structure of molluscs and the morphology of squids, the front end should be the abdomen, because the feet are on the abdomen, the back end is the back, the back side is the front, and the abdomen is on the back. This is the morphological position of the squid, but for the sake of observation and description, the former positioning is often used. Squid is also called squid and cuttlefish. In fact, it is not a fish, but a shellfish, but its shell has degenerated and turned into a white endoskeleton. There is a pair of well-developed eyes on the squid's head, and 10 legs grow around its mouth, 2 of which are particularly long, with many protrusions at the end that can suck objects, called suckers. Some squids have claws on their long legs, which are not only tools for catching food, but also weapons for fighting "enemies". Squids are agile and can swim up to 150 kilometers per hour. Some will rush out of the sea and glide for dozens of meters. They are known as "living rockets" on the sea. Squid is not a fish either, it is a "relative" of cuttlefish. Squid is generally slender in shape, with a long rhombus-shaped end and fleshy fins on both sides of the carcass. When viewed upside down, it looks like a "javelin head"; the dried product is flat and slightly slender. Cuttlefish are slightly flat and wide in appearance, and are also different from squid in other features, and the dried product is oval. Press your finger hard on the middle of the fish carcass, and the feel will be different: if it is softer, it is squid, because squid has only a leaf-shaped transparent membrane running through the body; if it feels hard, it is a cuttlefish, because cuttlefish have a boat-shaped hard cuttlefish bone.

Press the middle of the carcass with your finger. If it feels hard, it is a cuttlefish. If it is soft, it is a squid. Because the cuttlefish has a hard cuttlefish bone that is like a boat, while the squid only has a leaf-shaped transparent membrane that runs across the body, the feel is different. In addition, squids are generally slender, with a long rhombus-shaped end, and fleshy fins on both sides of the body. When viewed upside down, they look like a "darthead", while the cuttlefish has a slightly wider shoulder shape, which is different from other characteristics of the squid. There are two common types of squid in the market: long and oval. The long one is a dried squid, and the oval one is a dried cuttlefish. In terms of quality, the long one is better than the oval one. Good-quality squids have thick and solid flesh, dry flesh, slightly reddish, and no mold spots. Peixiang tender squids are light yellow in color, transparent, and thin. Old squids are purple-red in color and large in size. There are many members in the squid family, including the firearm squid, the long-lance squid, the Chinese squid, the Dunn squid, the sword-pointed squid, and several other species. Squids are generally called squids, and another type is called cuttlefish. Chinese squids have strong swimming ability and often migrate in groups, sometimes rushing into schools of fish to hunt. They usually sink to the bottom of the sea during the day and rise to the surface of the water in the morning and evening, fiercely hunting fish and shrimps.

Squid and cuttlefish are somewhat similar in appearance, but they are also obviously different. Squid has a long and narrow body with a tip that looks like a javelin, so it is also called a squid. The long legs of a squid are not as long as those of a cuttlefish, and they cannot be fully retracted into the body. When we eat a cuttlefish, we must remove its endoskeleton, but the endoskeleton of a squid has become a leaf-like sheet, so of course it can be eaten.

Squid, also known as cuttlefish, cuttlefish or cuttlefish, is an animal of the order Sepiida in the class Cephalopoda of the phylum Mollusca. Unlike squid, squid has a boat-shaped hard calcareous sheath. Image: Squid&in=9 Octopus, also known as stone dweller, is a general term for animals of the order Octopus in the class Cephalopoda of the phylum Mollusca. Octopus has eight head legs. Image: Octopus&in=3 Squid, also known as squid, is an animal of the order Scutellaria in the class Cephalopoda of the phylum Mollusca. Image: Squid&in=3

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The colors are different. The cuttlefish you see on the market are generally dark brown, with short and thick tentacles, a wide head, and a large and hard spine; while the squid is reddish brown, with long and slender tentacles, a pointed head, a long and slender spine that is soft and transparent.