CATDOLL : CATDOLL: How and when do jellyfish reproduce?

1. How and when do jellyfish reproduce?

When reproducing, male jellyfish will first discharge sperm, at which point they will continue to move with the water flow. Then the female jellyfish will collect these sperm and complete the fertilization process. Some female jellyfish absorb sperm through their ovaries, while others fertilize by swallowing sperm directly into their mouths. When the fertilized eggs develop to the larval stage, they will leave the mother's body, drift for a period of time, and then sink to the bottom of the sea. They will then become polyps, and then divide, develop, and slowly grow into new jellyfish. 1. How do jellyfish reproduce? Jellyfish are a type of lower organisms that live in the ocean. They usually move in groups. Reproduction will occur during the breeding season. The specific steps are as follows:

1. Ejaculation of sperm: Jellyfish are dioecious. When the breeding season comes, the first step in jellyfish reproduction is for male jellyfish to ejaculate sperm. Their mouth is multifunctional, and it has the functions of eating, excretion, and reproduction. Therefore, sperm is also ejaculated through this part. When male jellyfish ejaculate sperm, they usually move with the water flow at the same time.

2. Combining into fertilized eggs: After the male jellyfish discharges sperm, the next step is the fertilization process. The female jellyfish will begin to collect these sperm in the water. Some species of female jellyfish absorb sperm through the ovaries close to the cloaca; some female jellyfish swallow the sperm and then complete the fertilization process.

3. Polyp: After the fertilization process is completed, the fertilized eggs will begin to develop. When they develop to the larval stage, they will leave the mother body, float in the water for a while, and then sink to a deeper position in the ocean. At this time, they will become larvae and finally become polyps. These polyps can split and develop into jellyfish.

2. When do jellyfish reproduce? Jellyfish will reproduce during the appropriate breeding period. This season is not certain, but generally speaking, it will be concentrated in the few months when the sea water temperature is more suitable. At this time, they will mate.

2. How do jellyfish reproduce? How to distinguish male and female jellyfish?

The tentacles of male and female jellyfish are very different. The tentacles of females are slender and extend upwards. The tentacles of males are shorter and thicker, always hanging down to the bottom of the body. In fact, jellyfish are dioecious, and there is no distinction between male and female. During the reproduction process, the reproductive glands will begin to produce sperm, and then the mature sperm will flow into the body of the female jellyfish to complete the fertilization process. Slowly, the fertilized eggs will develop into larvae, leave the mother body, wander in the water, and then develop into adult jellyfish.

How do jellyfish reproduce?

I believe many people know about self-fertilization. Some animals have no gender distinction at all. They are female at certain times and male at other times. They can reproduce on their own and do not need to rely on the opposite sex. Jellyfish are like this. Jellyfish are dioecious. At certain times, jellyfish are in the polyp form, which means that jellyfish will produce mature sperm. Then after the sperm appears, the jellyfish will become a polyp form. At this time, the mature sperm will complete the fertilization process in the body, develop into a jellyfish larvae, and leave the mother body. The small jellyfish you see may be the jellyfish cub, and then through constant eating and drinking, it will grow into a big jellyfish.

How do jellyfish distinguish between male and female?

The gender of jellyfish is quite obvious and can be judged by the tentacles. The female tentacles are very thin and long, while the male tentacles are short and thick. The female tentacles always extend upwards to protect the fertilized eggs in their bodies. The male tentacles extend downwards to facilitate swimming. At different times, jellyfish will show different genders, which is also very magical and a work of nature.

Summarize

If you buy jellyfish, you can provide them with a vertical and clean fish tank and let them live in it. When the jellyfish breeding season comes, some small jellyfish will appear in the fish tank, and you can get more and more jellyfish. Jellyfish look very beautiful and can glow, so they are especially suitable for keeping in fish tanks.

Many jellyfish reproduce asexually, because they are generally hermaphroditic. If the tentacles are thinner and longer and vertical, then they are females. If the tentacles are shorter and vertical, then they are males.

The reproduction method is that the male jellyfish releases sperm, and then the female jellyfish collects the sperm and completes fertilization. The jellyfish can be distinguished by its shape and color.

You can determine whether it is male or female based on the tentacles. If the tentacles are relatively slender, they are generally female. Jellyfish also reproduce through fertilized eggs.

3. How do moon jellyfish reproduce?

Moon jellyfish are an important part of plankton and are found in all oceans around the world. Through sexual reproduction, they can produce fertilized eggs, from which their larvae develop. The larvae have countless cilia on their body surface for swimming.

The proliferation of moon jellyfish

There are two different forms of moon jellyfish, the first is a polyp, which is fixed to the seabed or other substrate and extends its tentacles upward to hunt and defend itself, and the other is a medusae, which floats in the water and drags its tentacles around to hunt.

The sperm of the moon jellyfish is discharged from the mouth of the male individual, enters the body through the oral cavity of the female individual and combines with the eggs to form fertilized eggs, which are then discharged from the mouth of the female individual and slowly develop into cyst larvae in the sea water. After a period of planktonic life, the larvae will sink and attach to the seabed substrate and become very small trumpet-shaped polyps, which already have a base and tentacles.

After a period of time, the hydra will begin to reproduce by transverse fission through asexual reproduction and gradually develop into a transverse body. When the transverse body grows up, it will separate from the hydra mother body, turn upside down in the sea to become an independent disc-shaped body, and begin a free floating life, and will slowly grow into a jellyfish body.

Moon jellyfish

4. How to distinguish male and female jellyfish

1. After observation, the tentacles that are slender and extending upwards are females, while the tentacles that are short and thick and hanging downwards are males.

Jellyfish are dioecious, with reproductive glands near the stomach. Mature sperm flow into the female jellyfish for fertilization. The fertilized eggs develop into larvae, leave the mother's body, swim in the water, and then develop into adult jellyfish.

2. Jellyfish are dioecious, with reproductive glands near the stomach. Mature sperm flow into the female jellyfish for fertilization.

The fertilized oval worm develops into a larva and leaves the mother's body. After swimming in the water for a while, it sinks to the bottom of the sea to form a larva, which then turns into a polyp. The polyp splits into multiple disc-shaped larvae, which then develop into a jellyfish adult. Therefore, there is no distinction between male and female jellyfish.

Additional information:

1. How do jellyfish reproduce?

1. Jellyfish belong to the phylum Cnidaria and class Scyphozoa. Jellyfish are dioecious and have a typical sexual/asexual reproduction alternation of generations, i.e. the polyp form in the attached period and the jellyfish form in the floating period.

There are male and female jellyfish in the jellyfish stage, and they reproduce sexually by laying eggs. After the larval stage, they enter the hydra stage, which is completely different from the jellyfish stage in shape and life form.

2. In the hydra stage, budding occurs and the number increases rapidly. Then they grow into jellyfish. In the larval stage, jellyfish can reproduce sexually and produce fertilized eggs as long as they are sexually mature. After hatching, they settle on the disk and become hydra. This special way of survival in which these two types alternate with each other is a cluster of clusters.

2. Do jellyfish have eyes?

1. Jellyfish is a low-level coelenterate, belonging to the class Medusa of the phylum Cnidaria in taxonomy. They appeared earlier than dinosaurs, dating back 650 million years. There are many types of jellyfish. There are about 250 species in the world.

2. Jellyfish do not have real eyes, but they have a primitive visual organ called a spot eye, which is similar to the compound eyes of insects. These eyes of jellyfish do not have a focal point for imaging, but like many lower animals, they can sense light and shadow, and can also perceive changes in the light of the external environment. Jellyfish rely on this visual system to live in the water and find and avoid obstacles based on changes in light and shadow.

3. The eye spots of jellyfish are distributed on the top edge of their umbrella-shaped bodies. The number of eye spots varies greatly depending on the type of jellyfish. Ordinary jellyfish have 8-10 eye spots, and some can have up to 24. However, there is a kind of luminous jellyfish that can have thousands of eyes, because each light-emitting organ distributed on their umbrella-shaped bodies also has a photosensitive function.

Jellyfish come in both genders

Jellyfish is a low-level coelenterate, belonging to the phylum Cnidaria and the class Scyphozoa in taxonomy. The body of a jellyfish looks like a transparent umbrella, and the diameter of the umbrella varies. The diameter of a large jellyfish can reach 2 meters. Some whisker-like strips grow from the edge of the umbrella, which are called tentacles. Some tentacles can be as long as 20 to 30 meters, equivalent to the length of a large whale. Jellyfish floating in the water extend long tentacles in all directions, and some jellyfish have umbrellas with various patterns. In the blue ocean, these swimming jellyfish of different colors are very beautiful. Jellyfish appeared earlier than dinosaurs, dating back 650 million years. There are many types of jellyfish, with about 250 species in the world, ranging from 10 cm to 100 cm in diameter, and are commonly found in oceans everywhere. There are about 8 common species in my country, namely moon jellyfish, white jellyfish, sea jellyfish, and crown jellyfish. People often classify them according to their umbrella-shaped bodies: some umbrella-shaped bodies emit silver light, called silver jellyfish; some umbrella-shaped bodies look like monk's hats, called Portuguese man-of-war jellyfish; some umbrella-shaped bodies look like white sails on ships, called sail jellyfish; some look like umbrellas, called umbrella jellyfish; some umbrella-shaped bodies shine with the light of colorful clouds, called rosy jellyfish... Most of them only live for a few weeks, and some live for about a year. Some deep-sea water jellyfish can live longer. The umbrella-shaped body of ordinary jellyfish is not very large, only 20 to 30 centimeters long, but the umbrella of larger rosy jellyfish can reach a diameter of 2 meters, and the drooping tentacles can be as long as 20 to 30 meters. In 1865, on the coast of Massachusetts, USA, a rosy jellyfish was washed ashore by the waves. Its umbrella was 2.28 meters in diameter and its tentacles were 36 meters long. Pulling the tentacles of this jellyfish apart, from the tip of one tentacle to the tip of another tentacle, it was 74 meters long. Therefore, it can be said that the jellyfish is the longest animal in the world. The main component of the jellyfish body is water, and it is composed of two germ layers, the inner and outer germ layers. There is a very thick mesoglea layer between the two layers, which is not only transparent, but also has a floating effect. When they move, they use the reflection of the water spray in their bodies to move forward. From a distance, it looks like a round umbrella floating rapidly in the water. When jellyfish appear in groups at sea, they live closely together and float on the sea surface like a whole, which is very spectacular. The sea waves are like snow, and the blue sea surface is dotted with many beautiful umbrellas, shining with faint light green or blue-purple light, and some even have rainbow-like halos. Many jellyfish can glow. The slender tentacles stretch out in all directions and float with them. The colors and swimming postures are extremely beautiful. There is a special gland in the umbrella of the jellyfish that can emit carbon monoxide to expand the umbrella. When the jellyfish encounters enemies or encounters a big storm, it will automatically release the gas and sink to the bottom of the sea. After the sea surface is calm, it only takes a few minutes for it to produce gas to expand itself and float up. When the comb jellyfish swims in the sea, its eight meridian tubes can emit blue light, and when it glows, the comb jellyfish becomes a dazzling ball of color; there are several parallel light bands distributed around and in the middle of the comb jellyfish, and when it swims, the light bands sway with the waves, which is very beautiful. Jellyfish glow by a wonderful protein called aquimin, which emits strong blue light when mixed with calcium ions. The more aquimin there is in the jellyfish, the stronger the light it emits. Each jellyfish contains only 50 micrograms of this substance on average. Although jellyfish look beautiful and gentle, they are actually very fierce. Under the umbrella-shaped body, those slender tentacles are its digestive organs and also its weapons. The tentacles are covered with stinging cells, which can shoot venom like poisonous threads. After the prey is stung, it will quickly become paralyzed and die. The tentacles will grab the prey tightly, retract, and suck it with the polyps under the umbrella. Each polyp can secrete enzymes to quickly decompose the protein in the prey. Because jellyfish have no respiratory organs and circulatory system, only primitive digestive organs, the captured food is immediately digested and absorbed in the coelenteron. In the hot summer, when we are swimming in the sea, sometimes we suddenly feel a tingling pain in the chest, back or limbs of the body, as if we were whipped by a whip. It must be the jellyfish that is stinging us. However, generally, if you are stung by a broken jellyfish, you will only feel burning pain and redness and swelling. Just apply nitrate or vinegar, and the swelling and pain will subside in a few days. However, on the sea surface from Malaysia to Australia, there are two kinds of jellyfish called sea wasp jellyfish (box jellyfish) and hand jellyfish. The toxicity they secrete is very strong. If you are stung by them, you will have difficulty breathing and die within a few minutes. Therefore, they are also called killer jellyfish. Therefore, when you are stung by a jellyfish and have difficulty breathing, you should immediately perform artificial respiration or inject a cardiotonic. Don't be careless to avoid accidents. Once a jellyfish encounters prey, it will never let it go easily. But just like the coexistence of rhinos and birds that clean up parasites for it, jellyfish also have their own symbiotic partners. It is a small shepherd fish, which is only 7 cm long and can swim freely between the tentacles of jellyfish without being afraid at all. When encountering a big fish, the small shepherd fish swims to the middle of the tentacles under the giant umbrella as a safe refuge, and uses the device of the jellyfish's stinging cells to cleverly avoid the attack of the enemy. Sometimes, the small shepherd fish can even lure the big fish into the hunting range of the jellyfish and kill it, so that it can also eat the leftover scraps of the jellyfish. So why don't the stinging cells on the jellyfish's tentacles hurt the small shepherd fish? This is because the small shepherd fish is flexible and can cleverly avoid the poisonous threads, so it is not easy to be hurt. It is just that occasionally it accidentally dies from the poisonous threads. Jellyfish and small herder fish live together and benefit each other. Jellyfish "protect" small herder fish, while small herder fish swallow small creatures living on jellyfish. The powerful and deadly jellyfish also have natural enemies. A kind of sea turtle can freely shuttle among the jellyfish group and easily tear off their tentacles with its mouth, so that they can only roll up and down, and finally lose their resistance and become a "delicious meal" for the sea turtle. There is a small ball on the thin handle in the middle of the jellyfish tentacles, which contains a small otolith, which is the "ear" of the jellyfish. The infrasound waves generated by the friction between the waves and the air hit the otolith, stimulating the surrounding nerve receptors, so that the jellyfish can get information more than ten hours before the storm comes. Then, they all disappear from the sea surface at once as if they have received an order. Scientists once simulated the sound wave sending organ of jellyfish to conduct experiments, and found that they can detect the information of ocean storms 15 hours in advance. Although jellyfish are low-level coelenterates, they have three generations living under the same roof, which is enviable. The jellyfish gave birth to baby jellyfish. Although the baby jellyfish can survive independently, the parent and child seem to have a deep affection and cannot bear to be separated, so the baby jellyfish all cling to the jellyfish's body. Soon after, the baby jellyfish gave birth to grandchildren of the jellyfish, and they are still closely connected.

Jellyfish are dioecious, with reproductive glands near the stomach. Mature sperm flow into the female jellyfish for fertilization. The fertilized eggs develop into larvae and leave the mother's body. After swimming in the water for a while, they sink to the bottom of the sea to form larvae, which later become polyps. The polyps split into multiple chain-shaped larvae, which then develop into adult jellyfish. Therefore, there is no distinction between male and female jellyfish.

No gender