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What breathes and where does a toothless tooth

Toothless ordinary, or river, often found at the bottom of ponds and lakes, where there is running and clean water. Usually snails are located at shallow depths.

In sand ponds you can often notice mother-of-pearl shells. Individuals are very easy to find in nearby water bodies, rivers or lakes. As a rule, they like to be located near the coastline, plunging into the fine sand with a blunt end of the body.

Usually, only the rear pointed part can be seen from the ground.

Toothless is found in bodies of water with running water.

In appearance, they resemble perlovitsy. But the larger toothless shell structure is thinner.

The difference from perlovitsy is that the first one has teeth on the blunt side, which form a lock. The toothless peaked parts on the sink are not.

Hence its name is called Toothless. In the pearl can be found teeth, if you open the sink.

The structure of the animal:

  1. The body of mollusks is covered with a shell, which protects the host’s body from predators.
  2. It consists of two doors or halves that fit snugly together.
  3. To the front edge of the shell has a slight expansion, and its rear part is narrow.
  4. If the clam is just caught, then its doors are tightly interconnected. Thus, the animal is protected.
  5. To open the shell, a knife is inserted between the doors, and two muscles are cut, which are attached to the shell at the back and front ends.
  6. When muscle contraction slam shut.

The opening of the mollusk occurs with the help of a tight ligament, which runs along the upper side of the shell. While the clam is alive, its flaps are covered.

But as soon as the animal dies, its muscles come to a relaxed state, and the shell opens.

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The flap has a three-layer structure: mother-of-pearl, porcelain and horn. Externally, the shell is covered with a white lime layer, then comes the porcelain, which has a coating of dark coffee or green color, and then follows the horny layer. The nacreous part is inside, it consists of small plates that are placed one above the other.

The layer beautifully shines, shimmers in multi-color shades. Shell growth occurs in summer faster than in winter.

On the plane of the stratum corneum, wide summer and narrow winter growth strips are found. It is for these sites that the mollusk age is determined.

To notice how the animal moves, it sinks into the terrarium, where sand lies on the bottom. After some time, it can be noted that the walls gradually open, and through the slit a thick muscular growth is exposed. It is called the “leg of the mollusk.”

Usually a large outgrowth. When the leg protrudes from the shell, the toothless tooth digs up the ground beneath it, sinks into the excavated hole with the help of the front end.

With the help of the leg the mollusk moves along the bottom of the reservoir. If the river is shallow, then there are traces of mollusks on the sandy bottom.

They are arranged in the form of small stripes, as if someone had run their fingers over the sand. Toothless are inactive species of animals. They usually have a sedentary lifestyle.

At an hour the mollusk creeps no more than 35 cm.

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Toothless ordinary feeds on small parts of animal remains and plants that are in the reservoir. Together with the liquid, the smallest particles are in the mantle cavity. At the front end of the cusps of the animal is a mouth that is surrounded by two rows of soft leathery folds – these are horn blades.

By moving the blades and covering their cilia, the power is in the mantle plane of the core, and from there it enters the digestive organs. Toothless does not apply to predators.

If you open both the flaps of the toothless, then you can find two offset folds of the skin on the sides. They cover the torso from the sides, while resembling the mantle.

The gap between the body of the river mollusk and the mantle is called the “mantle cavity”. It contains the organs of the shell. They can be clearly seen if you move the mantle cavity.

Bivalves have a soft body, so they are called “mollusks” or “soft”.

Toothless is not a predator

In the back of the sash, the toothless does not fit close to each other. They do not close in the place where parts of the mantle are located. Between them are two holes.

Through the lower cavity clean water enters the body of the animal. Through the upper hole, it pours out.

The animal lives in a place where there is water circulation, therefore the mollusk is in constant oscillation of multiple cilia, which are located on the internal organs of the animal.

Many animal lovers are interested in the question of what the toothless breathes. On the sides of the body, behind the legs, in the mantle cavity are its paired respiratory organs, which are called gills. They are brown in color.

Water, which is in the mantle cavity, brings oxygen, which is dissolved in water. At the same time, carbon dioxide is released from the gills into the aquatic environment, which accumulates in the primary body of the mollusk.

The description of the nervous system of a toothless one is very simple. It consists of 3 pairs of nerve nodes, which are interconnected by nerve endings.

Animal catches irritation. If you touch the open sink, it will immediately close.

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If the clam is kept at home, it is very sensitive to the water in the aquarium. If the toothless is in a terrarium, then chemistry cannot be added to the water, otherwise the animal will immediately die from it.

And also the mollusk likes to have a large amount of dissolved oxygen in the water. In a terrarium, algae must necessarily grow, and a special device must be put in the water, which will create forced aeration.

Content in an aquarium:

  1. Individuals can easily settle in the home aquarium.
  2. If placed in a mollusk’s home terrarium, it will become the best filter.
  3. Toothless feeds on different microorganisms, thereby cleansing the fluid in the aquarium.
  4. Some fish breeders grow mollusks to feed red-eared turtles or aquarium fish.

Toothless can be grown to feed turtles

In the body of the mollusk is a lot of iodine, zinc and other necessary elements for the full development of fish. Usually before serving the fish mollusk crushed.

If you start a toothless dog as a pet, then with proper care it will be able to live for more than 2 years.

When traveling in an artificial pond, the mollusk plows sand, plants can be damaged if they have a weak root system. The way out of the situation is to plant algae in special pots. The optimum temperature for clam water is 20 or 25 degrees Celsius.

Before placing the mollusk in an artificial pond, he must be held in quarantine, acclimatize to an unknown environment. It does not matter where the animal was purchased: in a pet store, grown in an aquarium or caught in a natural pond.

It is necessary to put in quarantine within 12 hours, after that aquarium water is added to a separate container in small quantities. The adaptation period is 8 days.

At this time, the water should be well aerated. If the toothless is located in an artificial reservoir, then its condition must be constantly monitored. Dead snail can be recognized by the wide open folds of the shell.

It is not recommended to place river mollusks in an artificial reservoir, because they will have a hard time adapting. In addition, river mollusks in captivity will not live long.

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Mollusks breed glochidia – the so-called parasitic larvae. In the external semi-gates of the female, embryos form, under natural conditions their development occurs in the fall and in the winter period of time, then the larvae reach the stage of glochidia and in springtime they are released into the reservoir through siphons.

What the larvae look like:

  1. If you look at them with the naked eye, then their appearance resembles brown mucus.
  2. The larva has a bivalve shell, cloves are located on the wings.
  3. They are selected from the female with the help of the teeth, as well as the adhesive byssus thread.
  4. With the help of it the mollusk is glued to the fish swimming by.
  5. The grown larva bites into the skin, parasitizes on the skin of the fish for a short time.
  6. At the same time, a tumor is formed in a river resident.
  7. After the larva grows, it leaves the feeding fish, lands on the bottom, where it lives independently.

Toothless can not be kept in the aquarium, along with those breeds of fish that can eat it. And also it should be noted that the mollusk can harm the inhabitants of the aquarium.

Toothless can ruin the algae, its parasitic larvae will lead to fish disease. Also, the presence of mollusks in the terrarium will lead to the death of small or young inhabitants of the aquarium.

To avoid infection, you need to keep only one individual in the tank.

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Animal excreta contain phosphorus and nitrogen – this causes the active growth of aquatic plants.Therefore, experts do not recommend keeping a lot of teethless in one aquarium. Animals do not tolerate planaria breed worms.

They can be entered into an aquarium through contaminated soil, live food or plants. Planaria eat the toothless larvae, and can also be stuck in the gills of adult individuals, thereby causing suffocation in the latter.

Toothless dioecious, but in appearance boys can not be distinguished from girls.

Now experts have more than 50 species of mollusks. Among them is an ordinary toothless or swan, duck, narrow. Characteristics of other species:

  1. An ordinary toothless in length grows no more than 20 cm, has thin walls.
  2. Duck clam reaches a length of not more than 15 cm.
  3. Narrow Toothless refers to a more rare form, differs from the others by flat shells.

In the waters of Russia, in addition to the toothless ordinary, you can find other species of individuals. Common common pond snail, amber ordinary, shutter ordinary.

Prudovik belongs to the gastropods

Detailed description of the species:

  1. Prudovik ordinary is a representative species of mollusks, which is ranked among the class of gastropods. A characteristic feature of a pond snail is its method of movement in water. He has a special body called the leg. During the movement of the leg is aimed up, with a little protruding above the surface of the reservoir. So that the individual does not sink while moving, the middle of its legs bends downwards, forms the shape of a boat. And while the shell is directed downwards. Such an original movement is not fully understood by scientists. The size of the pond snail reaches 5 or 8 cm. The color of the cockleshell varies in color from dark brown to yellow, and its structure is thin and transparent. Prudoviki are considered molluscs, they eat both animal and plant food. But mainly aquatic plants, leaves and algae are used as food.
  2. The common amber belongs to the pulmonary subclass of mollusks; it belongs to the amber family. Adult individuals reach a length of up to 22 mm.
  3. The shutter is very small, its size does not exceed 1 cm. The difference of the shutters is that their breathing takes place with the help of porous gills. Therefore, animals are listed as pulmonary.

Toothless is an interesting type of animal that is often found at the bottom of Russian water bodies. Their mother of pearl shells is difficult not to notice.

They live well not only in wild waters, but also in home aquariums.

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