Medusa aurelia: description, features of content, reproduction. Aurelia - eared jellyfish

Medusa aurelia - a species of marine life,which is very interesting and mysterious. Therefore, they are often kept in aquariums. This article contains information about who is a jellyfish aurelia: a description, features of the content, reproduction of this species.

general description

The aurelian umbrella is flat and in diameter canto reach 40 cm. Since it is based on a non-cellular substance (it consists of 98% of water), it is completely transparent. This quality also determines that the weight of these animals is close to the weight of water, which greatly facilitates swimming.

It should be stipulated that the jellyfish aurelia structurehas very interesting. So, on the edge of her umbrella there are tentacles - small, but mobile at the same time. They are very tightly seated with a huge number of stinging cells.

This jellyfish has a quadrangular mouth, has 4 movable lobes at the edges. Their reduction (they are also covered with stinging cells) makes it possible to pull the prey to the mouth and securely capture it.

Content

The content of jellyfish is differentspecificity. Initially, it's in aquariums. For jellyfish special containers are required, providing a circular smooth flow. That allows animals to move safely, without fear of any collisions. This is important, because the aurelia, or the eared jellyfish, has a very soft and soft body, which is easily damaged.

It is necessary to ensure the correct flow rate, which should allow the animals to "soar" without problems in the water column. Only in this case the danger of causing harm to their bodies should not be.

Specificity is also that for jellyfishIn aquariums, the use of aeration is absolutely excluded. This is due to the fact that air bubbles can be under the animal's dome, there to get stuck and then break it, which is very dangerous and can lead to the death of the jellyfish.

They do not need special lighting, mostly simple backlighting.

Also note that in water filtrationthere is no need. As a rule, it is enough only to regularly replace water, so that its quality always remains at the proper level. If there is no desire to constantly update the water, it is also possible to set up a life support system. It is important to take care of the animals properly. Because they can be tightened into the fence.

In addition, it should be borne in mind that the aurelia jelly must live in a fairly large aquarium, since it needs to be able to freely extend the tentacles to their full length.

Feeding

How are jellyfish fed? They are perfectly suited mixture, which consists of Artemia, phytoplankton, highly crushed crustaceans and seafood. Although at the moment there are various ready-made feeds on the market, which aurelia (eared jellyfish) can also eat. But there is one feature. If the animal feed is not at all like it, they can start eating other jellyfish.

Reproduction

Medusa aurelia is a dioecious. Thus, the testes in males have a milky white color, they are perfectly visible: these are small semirings in the animal's body. Female have ovaries of violet or red color, which are also visible on the lumen. Therefore, by coloring it is possible to understand the sex of the jellyfish. Aurelia for their lives multiply only once, and then perish. Their main distinguishing feature is the manifestation of care for their own offspring (which is not the case with other species).

It is worth noting that the fertilization of eggs, as well astheir further development occurs in special pockets. In them, the eggs enter through the gutters from the oral opening. After fertilization, the egg divides into 2 parts, each of which is further divided in half and so on. Due to this, a single-layered multicellular ball is formed.

Some of the cells of this ball fall inside, which can be compared with the pressure on the rubber ball. Because of this, a two-layered embryo arises.

He can swim, thanks to a large numbercilia, which are located on its outer part. The embryo then becomes a larva, which is called a planula. For a while she just swims, and then falls to the bottom. It is attached by the front end to the bottom. Fast enough the rear end of the planula is transformed: in this place the mouth appears, and also the tentacles are formed. And it becomes a polyp, from which later small jellyfish are formed.

Interesting Facts

Medusa aurelia is often used in medicine. From it in the Middle Ages, laxatives and diuretics were produced. And to date from the poison, which is contained in the tentacles of animals, they develop means for regulating the pressure and treatment of various pulmonary diseases.

Farmers of the Caribbean state use poison fisalion in the form of poison for rodents.

Jellyfish can effectively cope withstress. They are bred in Japan in special aquariums. Unhurried, smooth movements of animals calm people, while keeping them very cheap and troublesome.

The juminophors isolated from jellyfish are used forbiochemical analysis. Their genes were transplanted to various animals, for example, to rodents, due to which biologists were able to see with their own eyes previously unavailable processes. Because of this action, the hair of green color began to grow in rodents.

Some jellyfish are caught off the coast of China, wherethey are removed tentacles, while carcasses are contained in marinade, due to which the animal turns into a cake from a thin, delicate, translucent cartilage. In the form of such cakes, animals are taken to Japan, where they are carefully selected for quality, color and size and used in cooking. So, for a salad jellyfish is cut into small stripes 3 mm wide, mixed with greens, vegetables, and then sauce.

There also appeared jellyfish robots. They, unlike real animals, not only beautifully and slowly swim, but also can "dance" if the owner wants to music.

Conclusion

Despite the fact that the jellyfish aurelia is verycommon, completely ordinary, it can not be called. In principle, these are very curious creatures, therefore, monitoring them and their content will be very exciting.