CATDOLL : CATDOLL: How do jellyfish reproduce? Introduction to the reproduction method of jellyfish

1. How do jellyfish reproduce? Introduction to the reproduction method of jellyfish

1. Release of sperm: Jellyfish are dioecious, and when reproducing offspring, the males release sperm first.

2. Fertilization: After the male releases sperm, the female jellyfish will collect it in the water. Some are fertilized in the ovaries near the cloaca, while others are swallowed directly for fertilization.

3. Development: After fertilization is completed, the fertilized eggs will begin to develop. When they develop into larvae, they will leave the mother body, sink to the bottom of the sea, develop into polyps, and finally slowly split and develop into jellyfish.

2. How do jellyfish reproduce?

It lives floating in the sea, with a white, transparent disc-shaped body, tentacles on the edge of the umbrella, and 8 notches. Each notch contains a sensory organ, also called a tentacle capsule. The capsule contains a calcium balance stone, eye spots on the inner surface of the capsule, and marginal petals below the capsule. The marginal petals have sensory cells and cilia, and have olfactory pits. Sperm or eggs are produced by the gonads and fertilized in seawater. Some sperm flow into the female body with water for fertilization. The fertilized egg undergoes complete and equal cleavage to form a blastocyst, and then a gastrula. At this time, cilia grow on the surface of the embryo and become a floating larva. After swimming in the seawater for a period of time, it attaches to seaweed or other objects and develops into a small polyp-like larva. The polyp-like larva has a mouth and tentacles and can live independently. Then it splits to become a layered larva, which then splits into continuous transverse divisions to form a disc-shaped individual, called a transverse body. When the transverse body matures, it falls off one by one, called the disc-shaped larvae, which develop into the jellyfish adult. It can be seen that although the life history of Scyphozoa has alternation of generations, the jellyfish form is developed while the polyp form degenerates into larvae.

Through asexual reproduction

3. How do jellyfish reproduce?

Um, I wonder if Shi Raohui should explain it in more detail.

If the jellyfish you are talking about is the Scyphozoa, it reproduces sexually, with male and female jellyfish. They produce sperm and eggs respectively, which then combine to form fertilized eggs. The next step is development. The larvae formed are called planula, polyp, and cyprid. There will be many cells on it that will split and form transverse bodies, disc-shaped bodies, and finally develop into jellyfish.

Note that the three types of larvae have no gender distinction. Only from the transverse schisis onwards do they have male and female distinctions.

Jellyfish are dioecious, with reproductive glands near the stomach sac. Mature sperm flow into the female jellyfish for fertilization. The fertilized eggs grow 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 disc-shaped larvae, and then develop into adult jellyfish. Although jellyfish are low-level coelenterates, they have three generations living under the same roof, which is enviable. Jellyfish give birth to baby jellyfish. Although the baby jellyfish can survive independently, the parent-child relationship seems to be deep and they can't 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 jellyfish, and they are still closely connected.

4. How do jellyfish reproduce?

Jellyfish "sail" like sailboats "Sailboats" are large groups of floating polyps that look like jellyfish. Like a sailboat, they float on the sea surface with buoys and sails. Jellyfish of the same species can be divided into two groups, depending on the location of their sailing. In the same wind direction, some "sailboats" choose this route, while others choose the opposite route. They act in this way to reduce the risk of all jellyfish being stranded together. In fact, this jellyfish is very small and they breed at a depth of 1,000 meters on the seabed. After fertilization, the larvae secrete a few drops of oil to float to the surface of the sea and appear as adults. Jellyfish "prisoners" Some jellyfish live together with other polyps of different species, and they will always depend on each other as long as the jellyfish does not leave. These jellyfish reproduce by budding from one of them. Although they live in a fixed group, jellyfish can still reproduce sexually. The eggs are fertilized inside the jellyfish and develop inside the jellyfish until they grow into flat-bodied larvae. When several flat-bodied larvae have grown into jellyfish, they will be released from a transparent bag. In addition, some jellyfish, their larvae have been developing in the jellyfish until they become another kind of larvae with tentacles, and then they leave the jellyfish.

5. Growth and reproduction of moon jellyfish

Moon jellyfish live and reproduce for a few months before dying naturally. In the wild, they rarely live more than six months, but some can live for several years in aquariums. The warm currents in late summer reduce their food supply, resulting in a decrease in their tissue regeneration rate, making them particularly susceptible to bacterial infection. In addition, seasonal reproduction also causes them to open their reproductive glands and become infected.