The Sharks are, without a doubt, the animals that are most afraid of them, or at least, the ones that inspire the most fear in human beings, although it must be recognized that some of their classes have earned that fame, although at the same time, that fame has harmed others who are harmless. If you want to know the Characteristics of Sharks, stay with us.
The Sharks
Sharks are part of the cartilaginous fish group (Chondrichthyes) in which rays and chimaeras are also found. Other names by which they can be called are Chondrichthyes, Chondrichthyes or Elasmobranchs. They are aquatic vertebrates, whose breathing system is carried out by means of gills and they swim thanks to the fins they have.
The shark is an animal that causes a lot of fear due to its absolute voracity. In general, a shark can measure about 8 meters long and have an arched mouth, provided with several rows of very sharp teeth.
Shark Characteristics
Depending on the species to which we are referring, sharks have the following characteristics:
- Size: 4 to 7 meters
- Class: Chondrichthyes
- Order: Condrictis
- Scientific name: Selachimorpha
- Number of species: 360
- Weight: the largest weighs about 21 tons
- Longevity: between 20 and 30 years
- Diet: Carnivorous
- Diet: Fish, mammals, birds
- Reproduction: Ovoviviparous
- Distribution: The whole planet
- Gestation period: depending on the species from 3 months to 2 years
- Origin: 455 million years ago
Apart from having a cartilaginous skeleton, sharks are distinguished from other fish by their teeth. They don’t have them anchored in their jaws and they have the ability to replace them very quickly. The largest number of species of sharks have an elongated and cylindrical body.
On each side of the https://kasaragod.imclassified.com/user/profile/220993 head they have between five and seven gill slits, depending on the species, although some species have an additional opening called a spiracle. It is a characteristic of most sharks to have a pointed snout.
The current species have a means of reproduction by means of internal fertilization. The males have a fin with which they manage to introduce their sperm into the females and the embryos will be protected inside small capsules.
The blood that cartilaginous fish have is different from that of fish with bony skeletons, because they have a high concentration of urea and trimethylamine oxide. These two substances help sharks to keep their body fluids in balance with seawater. Their fins are rigid type. Their skin is covered with scales called placoids.
Sharks are animals that are perfectly adapted to their environment. Over time, they have managed to develop knowledge.acacia.red organs capable of perceiving the slightest drop of blood, or the slightest vibration or movement. Contrary to popular belief, sharks have a good sense of sight. All these characteristics, together with the fact that they have developed a brain superior to that of the rest of the fish, make them predators of the sea.
In a span of around 400 million years, sharks have achieved a slow evolution. This has given them the ability to be able to adopt different shapes and sizes, giving rise to new organs, achieving a better development of their senses. This evolutionary process has given rise to the fact that today we have a great diversity of species that can be observed in our seas, since we have 368 recognized species of sharks.
Where they live
Sharks can be found in every ocean on Earth. They are animals mail.hoidapnhanh.org that like open waters, so on rare occasions they could be seen near the coast. When this happens, the reason is usually that the animal is disoriented, since they have the habit of being guided a lot by the sea currents and if these have been stirred up due to bad weather or due to a lot of wind. In these cases, they are more likely to approach beaches or lower waters.
They tend to prefer the coldest waters, normally living in the most superficial level of the water, and there are only some species, the minority, that prefer to enter deeper waters, even reaching the bottom of the sea, but it is not a predominant behavior.
They are gregarious animals, so they enjoy being surrounded by their own, although as they become larger, they tend to separate from their group, beginning to travel alone or with a very small group of other specimens. joining only other specimens at the time of reproduction.
What sharks eat?
The diet of sharks is carnivorous, something we already know thanks to the movies and documentaries in which we have been able to observe what this animal is capable of when hunting its prey. We can get another idea of ​​their type of feeding just by looking at their sharp triangular teeth, which they use to nail their prey, tearing the meat and holding it very firmly so that it does not escape.
Sharks usually feed on animals smaller than themselves, which they will swallow as they are, without any inconvenience, executing a direct shark attack and using great speed, although it is also capable of feeding on fish or other beings that are larger, giving them a good https://anunt-imob.ro/user/profile/440777 bite. If they lose a tooth in an attack, the missing tooth will be replaced in a few days.
Sharks have different techniques to hunt their prey, one of the best known is the one they use with medium-sized victims and which they need to be able to stun to facilitate their attack. For this reason, the shark visualizes its prey, and then makes a swift attack that will leave the prey stunned, a moment that the shark takes advantage of to bite and kill it.
Reproduction of Sharks
Sharks have a type of ovoviviparous reproduction, that is, the shark pups are going to gestate inside the mother, but with the difference that this happens inside structures that act as eggs. During the mating season, the male goes in search of a female and will only mate with that female that secretes http://www.chinoartelengua.com/respuestas/index.php?qa=user&qa_1=allachmomp substances that will indicate to her partner that she is ready to procreate.
The copulation of these animals is very fast, although on multiple occasions the male shark has been observed biting the female in order to stop her, so that she does not move. When the copulation process has concluded, gestation will vary depending on the species to which we are referring.
Existence
The shark is one of the animals best known to people, even if they have never seen the sea, because of its physical characteristics and because of the multiple stories of how deadly its attacks can be depending on the circumstances.
There is evidence that sharks have inhabited the earth for millions of years, even long before there were populations on the continents.
There are, as far as is known, at least 360 species of sharks around the planet. These predators are also known as sharks, and some sharks are called silky sharks, as is the case of the white shark and the bull shark. They have a balancing function in the oceans, so that the decline in their populations can trigger an environmental imbalance.
Sharks have colors that help them camouflage themselves from potential predators or potential victims. The usual thing is that the upper part of its body has a dark coloration and its lower or ventral areas are light or white. Their fur is rough, tough, and thick, features that are great for protecting themselves from other animals. In fact, the skin of sharks is known to have dermal denticles that allow them to move with silent movements.
They have the ability to perceive electrical impulses, which makes it easier for them to hunt. They are more active animals at night for hunting. There are sharks that have an amazing ability to adapt, such as the bull shark, which can live in both fresh and brackish waters.
