What do lobsters do and how do lobsters come from?

Lobster (scientific name: palinuridae) is a common name for a species in the family Lobsteridae of the Molluscausta phylum Arthropodae. It is also known as prawns, dragon head shrimp, shrimp kui, sea shrimp, etc.

It has a coarse cephalothorax, a hard shell, colorful colors, a short abdomen, a body length of generally between 20 and 40 centimeters, weighs about kilograms, and is partially chelae-free, and the abdominal limbs can evolve into chelae. The heaviest can reach more than 5 kilograms, and is known as the lobster goby. The body is thick cylindrical, dorsoventrally slightly flattened, cephalothorax developed, thick and spiny, with a pair of powerful supraocular spines on the anterior margin**, with a closed gill compartment.

It is mainly distributed in tropical waters and is a valuable seafood.

You can play with it in the water and eat it on the table.

In the future world, couples must have common characteristics, and if they fall in love with a blind person, they will poke themselves in the eyes.

If lobsters are an invasive foreign species, you might be surprised. In fact, it is. The old Nanjing people said that in the twenties and thirties of the last century, when the Japanese army invaded China, lobsters were selected as one of the species that invaded China because of their strong adaptability and great threat to the original organisms.

And Nanjing is one of the earliest areas to have lobsters. After breeding in the rivers, lakes and ponds in the suburbs of Nanjing, it quickly spread in Jiangsu and Zhejiang. Calculated carefully, the history of lobsters coming to Nanjing has been seventy or eighty years.

In fact, its scientific name is crayfish, which is native to the southern United States and northern Mexico. It is introduced in northern Scandinavia, Australia, Japan, Africa and some islands in the Pacific. It is recorded that the Japanese army on Saipan Island used shrimp for food when they were short of food during World War II.

However, the entry of lobsters has had a certain impact on the local biosphere in Nanjing. It poses a threat to local fish, methylides, and immortal plants. Not only do they dig holes in the ridges of waterways, but they also threaten the safety of the dam installations.

So during the famine, people began to catch and eat these alien species with large pincers. There are no lobsters in China.

Japanese tourists never eat lobster when they come to China. They know the secrets of lobsters.

In those years, the Japanese devils invaded China and killed many Chinese. What to do with the bodies of these Chinese? Burying cannot cover up the crime, and burning is too wasteful of oil.

So they put a Japanese shrimp aquatic creature into "lobsters" that eat the pieces of corpses and stocked them in the rivers and lakes of China to dispose of the corpses. Later, the devils surrendered, and these lobsters also flooded Chinese waters.

Lobsters like foul-smelling environments, and clean waters are not conducive to growth. Therefore, lobster farmers never stocked fish ponds, but connected to farmers' toilet excretion channels in stinky ponds. When the feces and urine from the toilet are discharged into the stinky pond, those lobsters frantically grab the feces and urine.

So these lobsters grow very fast and are full of germs.

You see the lobster in front of you is pretty clean, isn't it? Haha, it was very dirty lobster that was just cleaned using a strong detergent after being transported to the restaurant. So there are chemical agents on this lobster that damage the human body.

Do you still eat lobster?

These lobsters are stained with the flesh and blood of revolutionary soldiers, stained with the dirtiest germs, and stained with chemical agents that damage the human body! If you have to eat, eat it!

The scientific name of crayfish is crayfish, also known as crayfish or freshwater crayfish. Professor Cai Shengli of the School of Fisheries of Shanghai Fisheries University introduced that crayfish are native to North America, and in 1918, Japan introduced crayfish from the United States as bait for breeding bullfrogs. During World War II, crayfish was introduced to China from Japan, and has now become an important resource in China's freshwater shrimp, widely distributed in the middle and lower reaches of the Yangtze River.

The scientific name of crayfish is Crayfish, which was introduced to China from Japan during World War II. At present, China's crayfish are mainly distributed in rivers, rivers and lakes in the middle and lower reaches of the Yangtze River, with a quantity of about 60,000 tons.

According to Professor Wang Xichang of the School of Food Science and Technology of Shanghai Fisheries University, the protein content of crayfish is high, accounting for about 16-20 of the total, the fat content is less than 0·2, and the content of trace elements such as zinc, iodine and selenium in shrimp meat is higher than that of other foods. In addition, crayfish can also be used as medicine, which can dissolve phlegm and relieve cough, and promote the healing of wound muscle after surgery.

The general trend of lobster growth is:

1. From hatching to body weight of 20 grams, the growth rate is an accelerated growth;

2. At the stage of reaching 50-100 grams, the growth rate remains at a relatively stable level, and beyond this stage, the growth rate will show a downward trend. As a result, an inverted U-shaped growth curve is formed.

3. Molting is divided into two kinds: long molting and reproductive molting, after the juvenile shrimp is separated from the mother, it will soon enter the first molt, replace it with a soft and wrinkled new skin, and quickly absorb water and grow, this is the growth of molting, from larvae to adults molting a total of 11 times.

4. After the female shrimp is sexually mature, she will begin to reproduce and molt, and she will have to perform reproductive molting before each mating and spawning in the future.

5. In addition, lobsters in the deep sea usually live to be about 100 years old.

Hello, glad to answer for you. Burrowing Crayfish prefer to burrow in a straight down or slightly inclined direction. Fighting When crayfish are severely hungry, they will bully the weak, fight each other, and eat the weak, but when the food is more abundant, they can get along with each other.

In waters with greater transparency, the crayfish is less likely to do so, as it does not like to be exposed to light, and during the day prefers to crawl under aquatic plants, under tiles, and in tree branches, or in abandoned burrows, and sometimes in the mouth of a wide sail.

Due to regional reasons, people in some regions cannot eat fresh seafood products, and some shops have just started to raise seafood products such as shrimp and fish for everyone to eat. However, the artificially farmed shrimp are all different from the sea lobster in terms of price and taste, and at this time, some shops will inevitably fish in the water, saying that their farmed shrimp are sea lobsters. So, how can you distinguish a sea lobster from a farmed shrimp?

What are the significant differences?

The difference between sea lobster and farmed shrimp.

1. Look at the shrimp head.

Farmed shrimp are generally raised in shrimp ponds, because there is no need to hide in the sand and mud, the shell will be very thin, and the sea lobster will be thick and a little hard to protect themselves in the sand and mud. When buying shrimp, I gently pinch it, and I feel that the shell is relatively hard and very malleable. The high-quality protein of farmed shrimp is not as good as that of sea lobster, and the shrimp head feels thinner to the touch.

2. Look at the shrimp brain.

Generally, the shrimp brain of sea lobster has shrimp paste, and farmed shrimp generally do not.

3. Look at the name of the type.

It can also be identified by the name of the species, and no shrimp can be both natural and reared.

Sea lobster, that is, natural shrimp, species include red whisker, oil shrimp, hemp shrimp, bamboo shrimp, safflower shrimp, and sea shrimp.

The difference between natural sea lobster and man-raised sea lobster:

The whiskers of artificially cultured sea lobsters are longer, while the natural sea lobsters have short whiskers, and the head of artificially cultured sea lobsters is long, with sharp teeth and too soft material, while the natural head of sea lobsters is short, blunt and hard.

How to choose a sea lobster:

1. When choosing, the first thing to pay attention to is whether the shrimp head is hard and shiny, whether the shrimp brain and shell are inseparable from the shrimp body, hard and firm, and whether it falls off.

2. Fresh shrimp are normal in terms of color and taste; In addition, it is also necessary to pay attention to the firmness and malleability of the shrimp flesh.

3. The shell of the fake and shoddy shrimp is dull and dull, the carapace is more black, the fish body color is red, and the carapace and the shrimp body are separated; The shrimp tissue is soft and has an ammonia odor; The chest and belly of the shrimp are loose, and the head and carapace are red and black.

4. The body color of the farmed shrimp is affected by the bottom mud of the breeding plant, and the skin is dark black, and the melanin black spots are clear and obvious.