River crabs usually hide in caves during the day and go out for food at night. On land, river crabs don't eat much, and often drag the food on the shore to the underwater or the edge of the cave before eating.
On the anniversary, river crabs eat as usual even when they migrate in winter, but they don't eat at low temperature for the time being. When the water quality is good, the water temperature is suitable and the bait is sufficient, the river crab can eat a lot. It can prey on several kinds of snails, soft-shelled crabs that have just molted and individuals that have been disabled, but river crabs have strong hunger tolerance. If it doesn't eat for 10 days or even half a month, the river crab won't starve to death.
Under the condition of artificial breeding, grasping the "fine-coarse-fine" structure of feeding bait according to the growth and development needs of river crabs is conducive to editing the growth and living habits of river crabs. Crabs spend most of their time looking for food. They are generally not picky eaters, as long as they can eat all the food they can. Small fish and shrimp are their favorites, but some crabs eat seaweed and even animal carcasses or plants.
Competing for crabs to eat other animals, other animals may also eat crabs. For example, humans regard crabs as delicacies, and waterfowl also eat crabs. Some fish like to eat crab feet just like humans. When young and underage crabs float in the sea, they may be devoured by other marine life, so crabs must lay a lot of eggs when laying eggs.
Breeding them depends on the mother crab to give birth to small crabs, and every time the mother crab will lay a large number of eggs, the number can reach more than one million. After these eggs hatch in the belly of the mother crab, the young crab can leave the mother and float around with the coastal water.
After molting several times, it grows into a big-eyed larva, and after molting several times, it grows into a young crab. The appearance of young crabs is almost the same as that of adult crabs, and they become crabs after molting several times [2]. Most sea crabs are directly discharged into the sea without hatching after their eggs mature.
One day, my mother said happily to me, "Let's go to Qinhuangdao to catch crabs!" " I said happily, "Good! However, how to get there? " My mother touched my head and said, "Go by bus!" " I thought: How long does it take to get there by car? But I really couldn't figure it out, so I asked my mother. I asked with a questioning expression, "Mom, how long does it take to go to Qinhuangdao by car?" My mother said to me unhurriedly, "About ten hours!" I said with a grain of salt, "Oh!" I asked again, "When shall we start?" My mother replied, "I will leave at five o'clock tomorrow."
At five in the morning, my mother woke me up first. Then, I packed some things necessary to go to Qinhuangdao. My mother smiled and said to me, "Let's go to the station quickly!" " I said happily, "Good!" My mother and I go to the station by taxi. On the way, I saw many green trees and many people. After a while, my mother and I arrived at the station. My mother said to me, "Look! The car is there! " So, we ran there as fast as possible. As soon as we got on the bus, we went to find seats and sat down. After a while, we drove. I sat in the car for a while and then slept soundly. When I woke up, it was dawn when I saw the station.
After getting off the bus, the guide took us to a place where we could catch crabs, and we began to catch crabs. I took out the little red bucket first, then I took out a small shovel and found one between two stones. Sure enough, I saw some crabs. I took a shovel and several of them ran away soon. I only caught one, but I didn't lose heart. After summing up my experience, I caught several more.
Unconsciously, several hours passed, and the time was up. I counted and caught 25. I can't tell you how happy I am. It is as sweet as honey.
We went back to the car and sat in our original seats. Ten hours later, we finally got home. When I got home, I said to my mother, "Although I was very tired this time, I learned to catch crabs."
My mother said to me, "My son has really grown up!" .
3. A 450-word composition about crabs
Eight feet, holding up the drum, two scissors dancing in front of the drum, born to be wild and overbearing, singing in your mouth. (Shooting animals), congratulations, you got it right! It is a crab. Today, I observed it.
A crab looks like an enlarged spider, but it has two more legs than a spider. It wears a suit of tan armor to defend against natural enemies. An oblate body has four legs on each side, and each leg has four parts. There is a pair of striking clips in front of it. These two guys are like a pair of iron pliers. They are good guys for attack and self-defense, and they are also necessary weapons for home travel. There are also a pair of small eyes the size of soybeans on that armor, sneaking around. Turn the crab over and look at its abdomen, then squeeze it. The male is pointed and the female is round.
In addition, the crab's living habits have three characteristics.
First of all, crabs are rampant, spitting bubbles while climbing. Although their bodies are smaller than my slap. In fact, they climbed up like runaway wild horses and disappeared in an instant.
Second, it is very intense. It doesn't behave for a moment, especially when eating. It is more fierce and unusual, just like someone wants to use it to grab food. If you touch its back at this time, it will hold you tightly and you can't get rid of it.
Third, it is very hungry, and it will not starve to death for ten days and a half. I remember during the Spring Festival, our family of three went home for the Spring Festival. A week later, we came home, thinking that the crab was dead and ready to "collect the body" for it. But after entering the door, the crab was safe and sound, waving pliers and doing morning exercises leisurely. How hungry it is!
This is my crab, a male and a female!
4. Composition about crabs and crabs
Eight feet, holding up the drum, two scissors dancing in front of the drum, born to be wild and overbearing, singing in your mouth. (Shooting animals), congratulations, you got it right! It is a crab. Today, I observed it.
A crab looks like an enlarged spider, but it has two more legs than a spider. It wears a suit of tan armor to defend against natural enemies. An oblate body has four legs on each side, and each leg has four parts. There is a pair of striking clips in front of it. These two guys are like a pair of iron pliers. They are good guys for attack and self-defense, and they are also necessary weapons for home travel. There are also a pair of small eyes the size of soybeans on that armor, sneaking around. Turn the crab over and look at its abdomen, then squeeze it. The male is pointed and the female is round.
In addition, the crab's living habits have three characteristics.
First of all, crabs are rampant, spitting bubbles while climbing. Although their bodies are smaller than my slap. In fact, they climbed up like runaway wild horses and disappeared in an instant.
Second, it is very intense. It doesn't behave for a moment, especially when eating. It is more fierce and unusual, just like someone wants to use it to grab food. If you touch its back at this time, it will hold you tightly and you can't get rid of it.
Third, it is very hungry, and it will not starve to death for ten days and a half. I remember during the Spring Festival, our family of three went home for the Spring Festival. A week later, we came home, thinking that the crab was dead and ready to "collect the body" for it. But after entering the door, the crab was safe and sound, waving pliers and doing morning exercises leisurely. How hungry it is!
This is my crab, a male and a female!
5. If there are 100 words to describe people's behavior when catching crabs, there are many stones and hay, so we will search there: Zhao Hongxiang first opens a big stone and two medium-sized crabs come out of it. Zhao Hongxiang and I soon started catching those two crabs. I know the skill of catching crabs. First, I catch the crab, then I catch its back, so that I can easily throw it into the bucket. Zhao Hongxiang can't catch it. He caught the crab with his hand, and the crab caught his hand, but he still put the crab in the bucket. Fortunately, the crab is not big enough to catch the wound. I quickly tell you that Zhao Jiaxing learned a good way to catch crabs, but Zhao Hongxiang still can't. However, he found a good way and threw the crab's calf into the bucket.
Please give me a favorable comment. Just a little effort.
6. Write a composition about crabs. I can give you a reference:
My home in the country has a fish pond several acres in which fish and crabs are kept. In summer, I always like to catch some crabs in the basin and watch them alive and kicking. I am very happy. The crab has a hard shell on its back, and there are three small forks on each side of the shell. The three flags inserted on the backs of military commanders in Beijing Opera are very imposing. When it meets an enemy, it will hold each other with its big pliers. At first, it will spit some bubbles. After opening the pliers, it will catch each other and be caught several times. It hurts! It's different from running, crawling around, full of pride, just like a furious drunk. When it is angry, it waves huge pliers and drums two black eyes. It's very cute. This crab looks lovely. There is a faint flower mosquito on its shell, and its color is almost the same as that of aquatic plants, which can confuse its opponents. Its claws are sharp and thin, with thin Mao Mao on them. What I look most like in SHEN WOO is the blue crab. It looks like a tank, invincible, and the shell on its back looks solid and straight, which makes the crab a kind of protection. Small claws are small but sharp, like spears. The spear and shield on the crab make it a brave soldier. Its pliers are flat and round, like a dragon knife, pliers are like steel forks, and a pair of eyes the size of rice grains are born inside. Except for the abdomen, the crab's shell is blue-gray, and it is covered with a gray gown. Its abdomen is milky white, like wearing a white shirt. Don't underestimate its shiny belly. It can be very useful. It can distinguish men from women, whether they are round women or three-dimensional men. The eggs laid by the female crab are yellow and stick together, just like small grains of rice hidden underwater. It's cute after listening to the introduction, so grab a few and observe them quickly.
7. How to write a composition about eating crabs Today, my worker came back from his hometown and brought a large net bag of crabs. That crab has a blue shell and a white belly. It has two pliers, which are used to take things and protect itself. They also have eight long feet. I took it out of the net and it quickly walked sideways on the ground. I think if it walks forward like us, then many feet may fight. It spits bubbles as it walks. That's crab breathing.
Then, mother said, let's cook the crab and eat it. Mother first poured the crab into the pool, then picked up the brush, grabbed its shell with one hand and brushed its white belly and feet with the brush. When brushing down, the crab grabs the brush with pliers and feet, just like a soldier fighting. It'll all be finished in a minute. My mother put the crab in the pot and started steaming. When steaming, my mother told me some common sense about eating crabs. So crabs can't be eaten with pumpkins. If they are eaten together, it will easily cause food poisoning. Eating crabs can't drink strong tea, which is easy to indigestion; You can't eat with pears yet, it will hurt your stomach and so on. Only then did I know that eating crabs is exquisite.
Mom said as she opened the lid. As a result, the blue crab turned red. Mom said that turning red means it is ripe. Then we began to eat crabs, because I couldn't eat crabs, so my mother had to peel crabs for me to eat. Crabs are delicious! In a short time, we have nothing left. I think it would be nice if there were a big bag of crabs.