Animals

How jellyfish reproduce

The lifestyle of different jellyfish species changes frequently. Some of the stages they go through are fast, and others can last for a year or more. In the first place, all jellyfish are either male or female, but both can create ovules and sperm, with this in mind, it doesn't take two of them to create offspring, they can create new asexual life.

Since jellyfish mating can occur throughout the year, the different stages of its v> cycle

Once the ovule and sperm have joined together, the larvae form, they form in the tentacles of the adult jellyfish. Then they separate and float on the water, they can be difficult to identify if you are not sure what you are looking for. Jellyfish larvae are oval in shape, to help them move. They will continue to float on the water until they find something to adhere to.

Once they adhere they move on to the next part of the jellyfish life cycle, this is known as the polyp phase. It is here when the solid parts of the body develop, for example, the mouth and then the tentacles. With those sticky tentacles they capture their prey, which they then place in their mouth.

The polyp stage can last for a year or more in the jellyfish life cycle. New polyps will continue to develop from a central nucleus, known as the trunk, they have very small feeding tubes that allow each of the polyps in that group to be able to obtain adequate amounts of nutrients.

When a group of polyps reaches maturity, grooves will be created along their length, as they begin to detach themselves from the colony they will become jellyfish, these can now be freely moved around. Jellyfish use sea current and wind to move horizontally, although the largest species of jellyfish have the ability to move vertically, under their own control.

Jellyfish go through two distinct stages. The first is the polyploid stage, where they take the form of a small entity with tentacles to feed, tend to float in the water without any real control over their movements. The influence of the sea current and the wind takes them around.

The second stage is when the reproduction or creation of the offspring occurs. Since each jellyfish can create ovules and sperm, it is not always required to match both sexes in the offspring creation process.

How is the reproduction of jellyfish

Jellyfish have an unusual life cycle in the animal kingdom. Jellyfish belong to a wildlife class called hydrozoo, which is characterized by an alternation of generations: a asexual generation happens to another asexual. Jellyfish have gender and the male sperm fertilize the female's ovules and the zygote is formed, which grows in the form of larva or planula, as in mammals, birds and fish.

This planula begins its free life, until adheres to the seabed and grows to form a polyp, which, for a while, only takes care of food. When the colony of polyps reaches an optimal state of nutrition, the division process for the formation of individual jellyfish begins. Polyps are divided by transverse grooves, their shape has changed and they resemble pineapples.

The small discs finally become free-living larvae, which grow and become an adult jellyfish with gonads in which the ovules or sperm will form.

They are apparently fragile, but, in reality, they are dangerous. The sea currents drag them to the beach, where they bother the bathers. It is at end of fallWhen the water cools, the time of year in which jellyfish reproduce. In spring, small jellyfish come out, which are growing. In summer, proliferation arrives on the beaches. Therefore, global warming, by increasing the temperature of the oceans, causes more jellyfish every year.

In case of a bite, it is recommended to apply solutions with ammonia to the wound and resort to the beach lifeguard.

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Jellyfish Mating

There are more than 200 varieties of jellyfish distributed across the oceans, so there is diversity in the reproductive and behavioral modalities of all of them. Some jellyfish have quite peculiar gestational cycles, while others adhere to the rest's reproductive pattern. But anyway, this part of your vital process is quite complicated.

Jellyfish are able to reproduce both asexually and sexually. The most common way in which jellyfish multiply in the polypoid phase (after the larval stage) is asexual, since a specimen only needs to release the ovules or sperm that it stores inside, so that they recombine in the water and the larvae are born. Sexual jellyfish are born from this asexual reproduction. In this way each jellyfish always alternates between a cycle of sexual reproduction and another asexual, depending on the state of the life cycle in which it is found.

Jellyfish of the Hydrozoa and Scyphozoa class reproduce asexually by means of budding or strobing, but in the Cubozoa class only intercourse occurs between two individuals, resulting in the birth of a single jellyfish.

Birth and breeding of jellyfish

The life of a jellyfish begins in the mother's tentacles like a small egg, from which an oval-shaped larva is born called a panula. When they are ready to be born, the planulae separate from the mother and begin to float on the surface by themselves. A few days later they descend to look for a solid substrate on the seabed to adhere to. It is at this time that the jellyfish is called polyp.

During the polyp phase the jellyfish undergoes a first metamorphosis, where the simple oval shape is replaced by another more similar to a crowned sack or cup. At the basal end of the polyp is the suction cup that fixes it to the seabed, while at the top a small hole that functions as a mouth and anus is visible. It still has no real appearance of jellyfish and can be confused with a sea anemone or other type of marine invertebrate.

Through the intake of plankton, the polyp is gradually maturing, and developing other parts of its anatomy such as the tentacles. When the time comes for sprouting, the polyp begins to reproduce asexually until it forms a large colony with small new polyps. Polyps literally sprout from the center of the parent's body, using a central nucleus known as the trunk. The new polyps are forming feeding tubes, which serve to obtain nutrients.

How long the polyps remain as such will depend on the environmental conditions. Some may extend for a long time (several years or decades) this stage of their pregnancy if the conditions are not conducive to their subsequent development. Finally when they are ready to take the next step, they part with the colony of polyps and in this way hundreds of thousands of baby jellyfish emerge.

Baby jellyfish can swim freely in the sea. They rhythmically contract the body to move through this medium, for this they ingest water and then expel it, using this movement as propulsion. These small baby jellyfish develop and reproduce, repeating in each case the reproductive cycle described above.