According to CCTV News reported on October 19, it is the season when a large number of crabs are listed, but recently there have been some rumors about needle-eye crabs on the Internet, which has made some consumers have doubts, rumors that some people say that the crabs bought have needle eyes, and there are rumors that these crabs have been injected with stimulants and water and other liquids, and illegal traders use needles to inject seawater chemicals and other liquids into the crab shell, abdomen and other parts to achieve the purpose of maintaining the crab's freshness and increasing the crab's weight.
Source: CCTV News
The small holes on the crab's body turned out to be caused by stepping on each other
So, why do crabs have so-called needle eyes?
In this regard, Luo Lin, a researcher at the Fisheries Science Research Institute of the Beijing Academy of Agriculture and Forestry Sciences, introduced that the so-called needle eye on the crab is a misunderstanding, and it has to retreat more than a dozen times during the growth process.
Source: CCTV News
Rowling also introduced that if someone really pricked it with a needle, the crab's shell might be broken, or the hole would not be so round or small, and it could only be made when it was soft. In fact, the eye of the needle on the crab, which is already rampant and domineering, is likely to be caused by the crab's fight with its own kind during its natural growth. In addition, crabs may also have some small wounds due to external forces during fishing and transportation, so the so-called needle eye on the crab is unlikely to be the eye of the needle.
Source: CCTV News
Filling a crab with a needle can cause the crab to die
It seems that the so-called "eye of the needle" on the crab is unlikely to be the eye of the needle, so is it possible for the crab to be injected with water?
The above-mentioned experts pointed out that rashly injecting crabs with water will change the osmotic pressure of the organ environment, resulting in the loss of water and atrophy of the crab's organs or the death of water absorption and expansion, which outweighs the loss. Therefore, the so-called eye of the needle can never appear on the body of a live crab.
Source: CCTV News
First of all, because the crab's muscle fibers are relatively delicate, its water retention rate is extremely low. If you draw water here and it will flow out, it can't hold water, and it has no effect on weight gain. Secondly, when you inject it, if you prick its internal organs, the crab will die, and the gain outweighs the loss. In addition, if you want to inject thousands of crabs, this is difficult to operate, how much labor you have to spend, and it may cause a large number of crabs to die.
Experts also introduced that they also tried to give the crab normal saline, thinking that this would not cause a change in its osmotic pressure, but after the shot, the crab did not live overnight and died, and it could not be beaten much, it was a crab of two taels, just hit 2 ml of water, equivalent to 2g of water, and the crab died. Because all animals will have a rejection reaction, water and glue as an injected foreign substance, the crab's immune system will fight it, and if it can't fight, it will definitely die. Therefore, if it is to increase the weight of the crab and inject water, it is meaningless, if you can't live with saline, then you can't live with glue or water.
Source: CCTV News
Ruan Guangfeng, deputy director and associate research librarian of Kexin Food and Health Information Exchange Center, also believes that first of all, crabs are sold in a fresh way, and forced water injection will change the osmotic pressure of crabs and damage their organs, accelerating death, and crabs will generally die in about 10 minutes after water injection. For merchants, the effect of achieving weight gain through water injection is minimal, and for consumers, they will not pay for dead crabs. As a result, this kind of outweigh the losses are almost non-existent. Secondly, the yellow and paste of the crab are firmly grown in the body, and the injection of the paste and the crab roe will be clearly separated, which can be distinguished at a glance, and it is difficult to achieve the effect of simulating the crab paste and crab roe. As for the injection of stimulants, ordinary stimulant drugs are not applicable to crabs, and more importantly, whether they are injected with water or drugs, the crabs will die quickly, and the price will therefore "dive", so the merchants will lose more than they gain.
(Source: Jimu News)