Thinking of the golden crab yellow, the fat crab paste, the saliva will flow down...
but! Slow down! Will you eat crab?
For example: which crabs can not eat, which are the essence, how to open crabs can eat the most meat?
Don't worry! We spent a lot of money to buy a lot of hairy crabs, hand-in-hand demonstration, this time to explain it at once.
Start with a picture of a male crab and a female crab.
(The one with the rounder navel is the female crab)
(The tip of the navel is a male crab)
1. Crab gills
Crab gills (commonly known as crab eyebrows) are on both sides of the crab's head and chest, look like eyebrows, gray-white, and can be pinched out of the water.
It is the respiratory organ of the crab, because to filter the water, it will inevitably stick to some pollutants, very dirty, do not eat.
It looks like this:
2. Crab stomach
The crab stomach is under the crab's eyes, usually hidden inside the crab yellow, is a transparent sac, three-dimensional triangle, a little hard to touch.
The stomach of the crab contains the food that the crab eats into the body, and there may be pollutants such as sediment, so don't eat it.
3. Crab intestines
It's in the "ass" of the crab. The first step in eating crab is to open the white umbilical cap. The black strip in the middle of the umbilical cap, like the shrimp line, is the intestine.
It contains excrement, which is very unhygienic and should be removed.
To summarize:
1. Crab Yellow:
Crab yellow is the liver and pancreas of crabs. When cooked, it is yellow or brownish yellow, slurry-like. Open the crab shell and you can see it.
Crab yellow is high in protein and fat (taking hairy crabs as an example, the same below), of which the protein content is as high as 24%[2], which is comparable to crab meat. Fat is 17.2% [2], which has something to do with its deliciousness, and more than two-thirds (68%) of its fatty acid composition is relatively healthy unsaturated fatty acids [3].
Tips:
The black membrane wrapped in crab yellow is mainly collagen and can be eaten. If you feel that the taste is not good, you can also skip it.
2. Crab paste:
Crab paste is the gonads of crabs. Among them, the male crab is a fine nest, which is milky white after cooking, is gelatinous, and has strong stickiness, that is, a lump of white sticky things.
The female crab is an ovary, which is orange-red and hard and lumpy when cooked.
Open the crab shell and you can see that it is in the middle and rear.
The nutrient content of protein, vitamin A, vitamin D and other nutrients in male crab cream is significantly lower [2-3], but it is not bad.
Of these, the protein is 15.4%[2], which is closer to that of river prawns. The fat is 9.8%[2], the same level as eggs. Cholesterol is not high, similar to crab meat.
The cholesterol content of female crab crab paste is relatively high.
3. Crab meat:
Crab meat mainly includes meat on the crab's body, pincers, and legs.
Crab meat has more protein (male crab and female crab are 24.2% and 22.4%, respectively), less fat (male crab and female crab are 3.4% and 4.2%, respectively)[2], and the content of minerals such as iron and zinc is not low [2].
Read more about the medical code:
1. Home Tools Edition:
Tools: scissors, chopsticks, small spoons
steps:
(1) Foot cutting: Use scissors to cut off the crab's 8 feet (step feet) and 2 claws (claw feet).
(2) Open shell: Break off the small lid of the crab's dorsal shell (cephalothorax) and abdomen (crab navel).
(3) Go to the internal organs: peel off or pick out the uneaten parts such as crab gills, crab stomachs, crab intestines, etc.
(4) Eat crab yellow and crab paste: use scissors to cut the crab in half from the middle, and use a small spoon or chopsticks to take out the crab yellow and crab paste on the crab shell and eat it.
(5) Eat crab meat:
Crab meat:
Follow the lines and use chopsticks to pick out the meat of the crab and eat it.
Crab leg meat:
Use scissors to cut off the joints at both ends of the crab thigh (long section), and then the section (tibia) has no flesh and cuts off along with the joints, leaving the crab calf (tarsal joint) and the thin toes (toe segment) as tools, and then use this tool to push out the flesh of the crab thigh.
Crab claw meat:
Crab claws are relatively hard, especially the powerful double claws of male crabs. Use scissors to cut the crab claws into three sections at the joints, use scissors to cut two symmetrical openings in the shell of the claws (most of the puff), and then break off the hard part of the outside and peel off the meat to eat.
2. Rough Freehand Version:
Tools: hands, teeth, a "crab calf" with toes
(1) Remove the feet: Use your hands to screw down the crab's 8 feet (step feet) and 2 claws (clawed feet).
(4) Eat crab yellow and crab paste: Hold both sides of the crab with both hands, break it open from the middle, and pick out the crab yellow and crab paste on the crab body and the shell on the back of the crab with your hands and mouth to eat it.
Follow the lines and take the meat out of the crab with your hands and mouth and eat it.
Use your teeth to bite off the joints at both ends of the crab's thighs (long segments), and then the section (tibia) has no flesh and bites off along with the joints, leaving the crab's calves (tarsal segments) and the thin toes (toe segments) as tools, and then use this tool to push out the flesh of the crab's thighs, or suck the meat out with the mouth.
Crab claws are relatively hard, especially the powerful double claws of male crabs. Like melon seeds, open the claw palm (most of the puff) with your teeth, then break the two pincer fingers, and scrape out the claw finger meat of the crab claw to eat.
1. Patients with hyperuricemia and gout
Cooked hairy crabs have a purine content of 121 mg/100 g[2] and are considered purine foods.[4]
2. People who are allergic to aquatic products
So as not to cause allergies.
3. Infants, young children, the elderly
Their gastrointestinal digestive function is relatively weak, do not eat more.
(Source: soogif)
There are also 2 types of people who eat less crab yellow yo!
Steamed hairy crab yellow has a high cholesterol content (252 mg/100 g)[2], which is nearly three times that of crab meat.
Therefore, people with dyslipidemia, especially those with hypercholesterolemia, and some patients with hepatobiliary and pancreatic diseases who need to limit fat and cholesterol intake [5], should eat less crab yellow.
If pregnant women are not allergic to crabs, and the gastrointestinal function is better, under the premise of ensuring freshness, safety and maturity, you can eat some crabs in moderation.
When eating, it is best to use crab meat, try not to eat crab yellow, because crab yellow is easy to enrich heavy metals such as cadmium [6-7].
Special Author: Liu Pingping | Registered Dietitian
Review expert: Chen Shunsheng | Professor, Director of the Department of Aquatic Product Processing and Storage Engineering, College of Food Science, Shanghai Ocean University
bibliography:
Chen Liqiao, Tuoba Nanshan. Biology of Chinese river crab[M].Beijing:Science Press,2017.
Yang Yuexin. Chinese Food Ingredient List Standard Edition, 6th Edition, Volume 2[M].Beijing:Peking University Medical Press,2019.
[3] Cao Zhenjie,Fu Chunpeng,Zhou Siquan,Wang Maojian,Li Xian,Wang Hui. Comparative analysis of nutrient composition of "crab yellow" and "crab paste" of Chinese river crab[J].Fishery Science,2017(2)
Yang Yuexin,Ge Keyou. The Complete Book of Chinese Nutrition Science, 2nd Edition (Volume 1)[M].Beijing:People's Medical Publishing House, 2019.
Gu Jingfan,Du Shouyue,Guo Changjiang. Modern Clinical Nutrition, Second Edition[M].Beijing:Science Press,2009.
Lu Lan, Lu Bing, Li Yi, et al. Analysis of arsenic, lead, mercury, cadmium and chromium in Chinese river crab in Hunan Province[J]. Chinese Journal of Health Inspection, 2019.
Dong Xinyue, Song Chao, Wang Qian, et al. Study on the Enrichment Effect of Different Edible Parts of Chinese River Crab on Heavy Metal Cadmium[J]. Chinese Agricultural Science Bulletin, 2019, 35(21).
*The content of this article is a popularization of health knowledge and cannot be used as a specific diagnosis and treatment recommendation, nor is it a substitute for face-to-face consultation by a practicing physician, for reference only.
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