Composition of jellyfish

Composition about Jellyfish 1 My father's classmates took my sister to Liu Gongdao in Weihai. After disembarking, I saw an uncle selling jellyfish at the dock. There are four jellyfish in each bottle, and the silver one swims like a silver umbrella, which is very beautiful. So I bought one as a souvenir for my three sisters and one for myself.

In fact, jellyfish is a low-level marine zooplankton. There are 200 known species, ranging in diameter from 10 cm to 100 cm, which appeared earlier than dinosaurs and can be traced back to 6. 500 million years ago, the body of jellyfish was mainly water, with a water content of 99%, so it was transparent.

Although jellyfish look beautiful and docile, they are actually very fierce and carnivorous. Under the umbrella, those slender tentacles are its digestive organs and its weapons. There are many stinging cells on those tentacles, which can emit poisonous silk-like venom, and the prey will soon be paralyzed and die.

After more than ten days, my jellyfish died, and my father said that maybe the water was too hot, so the jellyfish couldn't bear to die and turned into water. It is also possible that the poor water quality caused the jellyfish to die.

A few days ago, my parents and I went to Nanjing to play. We went to the famous Sun Yat-sen Mausoleum and Zuhai Pavilion. In Zu Hai Pavilion, I found an animal that left a deep impression on me. Its name is jellyfish.

I remember that my whole family was in the Zu Hai Pavilion that day. I walked cheerfully to my parents and looked around, hoping to find some novel animals here. We are walking along a street, and the lights overhead are getting darker and darker, but the colored lights in the roadside glass water tank are constantly changing, which is particularly eye-catching. I poked my head out and looked at it. I was surprised to find a group of small jellyfish in it. At that time, I cried excitedly, because I only saw beautiful jellyfish on TV. This is the first time I have ever seen such a lovely jellyfish! Small jellyfish float and shuttle freely in the water, just like a large light leaf, and also like a small ant bed. After watching it quietly for a long time, I found that their top surfaces are all like a clock except the hour hand, minute hand and second hand. I watched the jellyfish's long thin feet drift around with their bodies. I really want to count how many feet they have, but my eyesight is not very good. I was shocked when I was ready to turn around and leave. I am surrounded by jellyfish, which dazzles me. Even the sea cheese we ate in the hotel has it!

Later, a strange collection was found at the exit: two small living jellyfish. I spent thirty yuan on them, and I think it's worth it! When I got home, I listened to the salespeople and gave them fresh air every morning. Look at them alive and kicking!

"Hey, Hu Hanyu, don't touch my little jellyfish!"

On Wednesday, our school organized a spring outing to the aquarium. There, I saw many sea creatures that I had never seen before. There are huge great white sharks, thin autumn and seahorses. ...

However, my favorite is jellyfish. Look! Under the changing light, the original transparent jellyfish also changed color, green, red and purple ... The change was so great that I was dazzled. Look! One moment they rise in groups like balloons, and the other they fall neatly like paratroopers. It's like performing for us. Welcome to visit. Jellyfish is so interesting!

Gradually, I was fascinated by it. I seem to be a lovely jellyfish, swimming freely in the sea with them.

The sea is a beautiful world. Shanghai Ocean Aquarium is also the place I want to go most. Because there are many colorful animals with different shapes here. My favorite marine animal is jellyfish. Last week, my father took me to visit it. In the aquarium, I got a detailed understanding of jellyfish through visiting and introducing.

Jellyfish is a marine invertebrate. Although jellyfish are small animals, you can bully them at will! You know there are strange weapons hidden in it. If you go swimming in the sea, you must be careful not to be stabbed by jellyfish in the sea. The stinging jellyfish is the red electric jellyfish. What does jellyfish stab people with? You see, jellyfish have so many long and thin "feet", but they are not real feet. They are called tentacles. Take a closer look. There are many small things on those tentacles. They are called stinging cells. It's a strange weapon of jellyfish. As long as you accidentally touch them, they will immediately stab you rudely! And when it stings, it releases venom. Jellyfish is an animal that can protect itself.

There are many interesting and strange animals in Shanghai Aquarium. Do you want to see my introduction? Actions speak louder than actions!

Composition 5 about jellyfish survived the summer vacation. The air on earth is as hot as boiling. People live on the earth. What is serious is that "life is worse than death"! Fans are useless, and everyone has to buy air conditioners. Enough! However, when people encounter "air conditioning disease" again, they don't know what to do. I heard that a "jellyfish underwater paradise" was opened, and the advertisement said: "Come to the jellyfish paradise, and you can choose anything fun, beautiful or fun! ! "Half of the adults don't believe it, but more than half of the children cling to the advertisement like magnets:" I'm leaving, I'm leaving, and I've been sunburned for a day, becoming an African and a traitor child in China! " I am one of them. Hum! If you don't go, I can go myself!

I took my own "private money" and sneaked on the bus to the park, joined the tour group, and then slipped behind ... Hehe, I'm not going with you old-fashioned tour groups! I take my own risks. That's called "fashion", okay?

I entered the jellyfish underwater park. Wow! It is really a unique cool world! I saw trees "shaded", clusters of flowers "competing for fragrance and beauty", and the fountain on the seabed was not water, but cool air. The most distinctive feature is that groups of lovely jellyfish swim around in droves, similar to beautiful crystal octopus, with transparent green, beautiful blue, pure pink and fiery red colors! I'm so touched! Finally came to a "good place", and it was not a deceptive advertisement!

I booked a room with oxygen and advanced equipment under the sea. Mom and dad, let me "taste" the advanced high-tech equipment first! The dishes at the bottom of the sea are boiled octopus and fragrant jellyfish, which are really crispy outside and tender inside, delicious and charming!

The next day, I went to the mysterious "jellyfish family" to play alone! It is said that there are magic jellyfish, model jellyfish and jellyfish infected with them. I casually said, "Haha, there is such a magical jellyfish! I am very lucky in my life. It is a good choice to make one or two jellyfish friends! "

The first jellyfish I saw was a model jellyfish. Its legs are thin and soft, and its whole body is crystal clear. I reached out my hand in a friendly way: "Hello! Make a friend! " It seems to be a very good jellyfish! It knocked out an antenna ... "Ah-wow! God, it hurts! " Make friends for the first time, hit a wall. I still don't understand what's going on It's really annoying to be so polite to you.

I met the magical jellyfish for the second time. It has a white beard and is black all over, but it is still transparent. When I saw an old man, I reluctantly said, "Hello!" "It performed magic for me ... but I was absent-minded. You know, magic jellyfish is the last thing you want to see your friends behave impolitely. It slapped me with a bang. " Bang-"I said," The jellyfish has electricity! "

I read the information about infected jellyfish. Finding jellyfish infection is the most polite thing, but ... "Ha ha, you are weak and I am strong. I want to bully you with this tone! ! "I found the infected jellyfish and forced a fork with an iron fork. Ah, the infected jellyfish got angry, tried their best to generate electricity, and passed on their infected bacteria to me through the iron fork. ...

"ouch!" Being infected by jellyfish is not only polite, but also very powerful!

Composition 6 about jellyfish was read in the newspaper: The golden eagle brought a batch of jellyfish for tourists to visit. I have long wanted to see jellyfish, but my mother has no time to accompany me to the underwater world. I can't miss this golden opportunity. So, I couldn't wait to pull my grandfather to the door of the Golden Eagle. I saw all kinds of jellyfish floating in lined glass jars. They come in different sizes and colors. Crystal clear jellyfish become colorful, dazzling and beautiful with the change of lighting!

Every jellyfish has a semicircle head, and some drag long "braids", as if colorful mushrooms were swimming in the water, and also like fairies descending from the earth with beautiful parachutes; They are even more skilled dancers, stretching their limbs and dancing lightly and gracefully in the water.

Jellyfish is an inferior creature. They have neither eyes nor noses. They eat and excrete through the same outlet. But they can feel it ten hours before storm warning! This is because there is a small ball on the thin handle in the middle of the jellyfish tentacles, and there is a small auditory stone in it, which is the "ear" of the jellyfish. Infrasound waves generated by the friction between waves and air hit the auditory stone, stimulating the nerves of jellyfish, making them feel it more than ten hours before the storm, and suddenly disappeared from the sea.

Jellyfish is really amazing! I like these sea elves.

Composition 7 About Jellyfish I have been to Ocean World twice, and I have seen many marine creatures that I have never seen before. One of them is. What impressed me most was the elegant jellyfish. The transparent body of jellyfish is covered with tentacles, and they dance as if trying to catch something. The umbrella-shaped body swims in the fish tank, which makes the fish tank full of fairy tales.

Later, I went home to check the information, only to know that the main component of jellyfish body is water, and the water content in its body can generally reach more than 97%. Most of them can only live for a few weeks, some can live for about a year, and some deep-sea jellyfish can live longer.

After reading the information, I can't help but fall into meditation: how did such a "weak" jellyfish survive the terrible storm in the sea? It turns out that jellyfish have a "special function", which is different from other animals. That is the ability to predict storms. There is a small ball on the thin handle in the middle of the jellyfish tentacles, and there is a small listening stone in it, which is the "ear" of the jellyfish. Infrasound waves generated by the friction between waves and air hit the auditory stone, stimulating the surrounding nerve receptors, so that jellyfish can get information more than ten hours before the storm warning, so they all disappeared from the sea as if they had received any orders.

Scientists used to simulate the sound wave transmission organs of jellyfish and found that they could detect the information of ocean storms fifteen hours ago, so they invented the "jellyfish storm predictor" according to this principle. "Jellyfish Storm Predictor" can predict ocean storms in advance and is widely used in fishery, tourism and even military fields.

Nature, like a knowledgeable teacher, can teach mankind endless knowledge. If we learn from nature, we will benefit a lot.

My name is jellyfish. I am an ancient creature, a lower animal in the animal kingdom. My body is transparent, without bones, shells and armor, so it is very fragile, but I have striped circulating muscle tissue, which can be used for swimming. I don't have special respiratory organs, and I rely on my skin and mouth to absorb oxygen.

Many jellyfish like me can shine. When I shine, my whole body seems to become a dazzling colored ball, and at the same time, my transparent hand will shine on the colored ball like a thin band of light. As soon as you swim, these light bands will swing from side to side, which is very charming against the blue light.

As far as I know, you humans say that our jellyfish glow differently from other animals. We have no lighting system. I rely on a wonderful protein called chickpea. When it contacts calcium ions, it can emit blue light. The more Aquiline jumps, the stronger the light.

I'm also a good hunter. I have poison in my hand. As soon as the tentacles are stretched out, even the soft jellyfish immediately becomes a terrible hunter. On the skin of my hand, there is a special cell called "stinging silk sac", which contains terrible toxins and fine inverted structure! !

Finally, don't confuse me with octopus.