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Requiem Shark

Scientific classification of Requiem sharks:

Kingdom:  Animalia

Phylum: Chordata

Class: Chondrichthyes

Superorder: Sharks

Order: Carcharhiniformes

Family: Carcharhinidae

Genus: Carcharhinus

Reqiuem sharks belong to the order of Carcharhiniformes. To this order also belong the families of houndsharks, catsharks, hammerhead sharks and false catsharks. Reqiuem sharks, also known as Sawtooth sharks, make up a large group of Carcharhiniformes Selahii, the second largest group of sharks after the family Catsharks. These groups include numerous species, which can easily adjust to both sea- and fresh-water.

We offer you an interesting information about Requiem sharks. After a closer look at the subfamily of Requiem sharks, it becomes obvious, that these predators dont stand out by their size. The largest among them are the Galapagos, the Bull and the Oceanic whitetip shark.

However, despite the small size of Requiem sharks they are considered to be very dangerous for people. Some species, especially the Bull, the Oceanic whitetip and the Caribbean reef shark are extremely aggressive ones. Thats why surfers, divers and all other bathers should remember about the danger.

It has been recorded many occasions of Bull sharks attacks at people even in fresh-waters. This happens due to the sharks ability of going far from the sea upwards a rivers mouth.

Its important, that all sharks of the Requiem family have similar habits and organization of body. The family of Requiem sharks is composed of numerous different «breeds», but we are going to provide you with information on the most spread of them. If you need more detailed information on certain species, for example, on the Bull shark, the Caribbean reef shark or the Silky shark you may find their personal «biographies» on our web-site.

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Galapagos shark.

The given sea predator inhabits only tropical waters of any ocean. More often they are found in coastal areas and coral reefs. The shark prefers any waters with strong flow. The Galapagos shark hunts both alone and in groups. An average length of a shark is three meters.

The Galapagos shark is a sea predator with rather thin and even slender build. Its interesting color varies from blue-gray till brown. The dorsal fin is rather large, the tail contains two unequal wide blades. The Galapagos shark doesnt have any distinctive stripes or patches. Rarely there is a long fair stripe on its side.

Its upper jaw is equipped with very sharp jagged teeth with wide bottom. On its lower jaw the teeth are tiny and styliform. Each of jaws contains approximately thirty teeth.

The Galapagos shark eats small animals, fish and octopuses, which cover the sea floor completely. Sometimes they hunt for iguanas and sea-lions. As many other species, these sharks eat smaller representatives of their order.

The Galapagos sharks breed early in spring and they are viviporous. Pragnancy lasts for little less than a year, namely for ten months. Then a shark gives birth to approximately ten pups, whose length reaches eighty centimeters. Ten years later they approach their puberty. The Galapagos sharks lifespan is about twenty four years.

The sharks pups are almost inoffensive, but an adult species is very dangerous. Being an easy and pleasing prey for elder congeners, newborn sharks are in danger themselves.  Only one fatal case associated with Galapagos sharks is known up to the date, but this fact doesnt proove that this shark is nice and offenceless. Before assaulting, the fish makes a number of narrowing circles around its victim, then it bands its back and opens the mouth anticipating the taste of the prey.

Galapagos sharks are of no practical interest for people. People dont fish them out purposely, but getting one accedantally they eat its meat and fins, which are

a gourmet delicacy.

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Copper (narrowtooth) shark.

The Copper shark is one of the biggest species of the family of Requiem sharks. It is three meters in length and weighs approximately three hundred kilograms.

The Copper sharks exterior is rather simple and typical: a streamline body with wide head and blunt nose with little nostrils. Its teeth are narrow and sharp.

The sharks color is very interesting and even beautiful. It varies from golden and reddish yellow to charcoal-grey and white. The caudal fins are of the same color, but pectoral and pelvic fins stand out by dark, almost black, patches on them.

The Copper narrowtooth shark usually inhabits tropical and subtropical waters in following regions:

westerly from Mexican latitude toward the shores of Argentina and Brazil;

easterly from the south of France toward South Africa.

northerly from Japan toward New Zealand.

The Copper shark can be found in nearshore coastal zones such as firths and coral reefs. It can be rarely found deeper than three hundred meters. Seasonal migrations in winter and summer are regularly performed by Copper sharks. In winter they drift to warmer waters and come back in summer.

Fish, shellfish, skates and smaller congeners make up the Copper sharks basal ration.

As well as other species of Requiem sharks, the Copper shark is viviparous. Pregnancy and delivery proceed in a way as it is typical for Requiem sharks. An average lifespan is about thirty years, although the population of Copper sharks constantly reduces. Newborn sharks grow too slowly and approach puberty at ten years. Small sharks are always in danger, because they become an easy prey for elder species. Thus, a great deal of all newborn Copper sharks dies before approaching puberty, so they cant propagate the species.

The Copper shark has an important role for people in commercial sense. Not only its meat and fins, but also lever and leather are priced highly.

The narrowtooth shark is dangerous for people, and they have been assaulted and seriously injured by them many times.

It is also important, that the Copper shark looks very much like the Dusky shark.

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Sandbar shark.

The Sandbar shark has no especially distinguishing features. As other members of this family it is three meters in length and weighs one hundred kilograms. Usually, females are bigger than males.

Its appearance is usual for Requiem sharks: a streamline body with wide head and blunt nose with little nostrils. Its teeth are narrow and sharp.

The sharks coloration varies from brown to white and its fintips are always of a darker tint.

The Sandbar shark prefers to live in tropical and subtropical waters with temperatures reaching twenty seven degrees. Usually the predator hunts at depths of about fifty meters. Its important to mention, that the Sandbar shark avoids of coming into coastal zones.

The population of Sandbar sharks decreases yearly. First of all, this happens because this shark is of the main industrial interest for people. Mainly, it consumes shellfish, skates and fish of smaller breeds. It rarely eats small members of own species.

The Sandbar shark is viviparous, which is typical of Requiem sharks. Coupling is very painful and dangerous for females, because during whole process their fins are being kept by sharp teeth of males. The sharks pregnancy lasts for ten months. When this period expires, the shark leaves for warmer and shallow waters, where it gives birth up to fifteen pups at once. Each of them reaches seventy centimeters in length.

The pups live at shallow depths. They reach puberty not earlier, than at the age of five years. Small sharks are in constant danger, because they are an easy prey for grown sharks. Thus, most sandbar sharks dont reach their puberty.

The Sandbar shark is not very dangerous, still, it can do serious harm to people.

However, it is namely the Sandbar shark that needs protection. Its population decreases rapidly and it may vanish from the face of the Earth at all.

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 Soupfin shark.

Specialists argued a lot about membership of the Soupfin shark in the family of Requiem sharks. As a result, its belonging to it has been proved, therefore it is stated that the Soupfin sharks exterior and habits are almost the same as those of other predators belonging to Requiem sharks.

The Soupfin shark is found in almost every warm sea or ocean. For example, in the Atlantic it dwells in the area from the Brazilian coast toward the Argentine, and easterly from Africa toward Island. The Soupfin shark is often seen in the Mediterranean Sea and in the Indian Ocean.

The Soupfin shark is slim and accurate. Its length reaches two meters and its weight never exceeds forty five kilograms. The sharks coloration varies from blue-gray to light brown. Fins are darker than other parts of the body, although there are no special paintings on it.

An average lifespan of the Soupfin shark is about thirty years, but there are some recorded occasions of a fifty-years-lifespan among them.

The process of breeding and bearing of little species among soupfin sharks has no differences from previous descriptions. On whole, everything looks the same. Small sharks are also in constant danger of becoming an easy prey for elder species. Thus, a great deal of all newborn soupfin sharks never reaches puberty and, accordingly, cant propagate the species.

The Soupfin shark is important in food industry not only because of its tasty meat and fins. The fat produced by its lever is also appreciated. It contains an enormous number of vitamin A and D and has no less therapeutic effect than cod-liver oil does.

On whole, the Soupfin shark is not dangerous. On the contrary, it needs our protection, because its number reduces yearly.

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Blacknose shark.

Usually the Blacknose shark is found in waters of the western side of the Atlantic: from the coast of North Carolina toward the coastal area of southern Brazil. The only place where the Blacknose shark is not found is the Caribbean.

The Blacknose shark is a small member of the family of Requiem sharks. Its length reaches two meters rarely and it weighs up to twenty kilograms.

Outwardly, these sharks dont differ much from the species, which are described above. The only difference is a noticeable dark patch on its nose. Due to this feature the shark has got its name.

The Blacknose sharks habits, life, breeding and bearing are the same as those of the others representatives of its family.

Today there are no recorded occasions of the Blaknose sharks attacks on humans. Although, people have to remember, that the predator has sharp teeth, which may cause a lot of inconveniences to them.

The Blacknose sharks meat, fins, leather and lever are very precious prizes.

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Bignose shark.

The Bignose shark is usually found in waters of the western side of the Atlantic: in coastal areas of America, Florida and Venezuela. In waters of the eastern side of the Atlantic it is found near Senegal and Ghana. In western waters of the Indian Ocean it inhabits the Red Sea and coastal areas of India and Madagascar.

The Bignose shark is rather big. It reaches three meters in length and is about fifty kilograms in weight.

There is only one recorded occasion of the Bignose sharks attack on people, but taking into account its big size and sharp teeth, people should avoid of meetings with this predator.

The Bignose shark is famous for its delicious meat and fins. Leather and lever are also precious.

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Silvertip shark.

The Silvertrip shark is often found in waters of the Indian Ocean, especially in its western part. In the Pacific Ocean this shark usually dwells in coastal areas of northern Australia, southern Japan, Mexico and Colombia.

The Silvertrip shark is rather big. It is three meters long and weighs up to one hundred and seventy kilograms.

Its habits, lifestyle, breeding and bearing are the same as all other Requiem sharks. Small sharks are in constant danger of becoming an easy prey for elder species. Thus, a great deal of all newborn Silvertrip sharks never reaches puberty and, accordingly, cant propagate the species.

There are only a few recorded occasions of the Silvertrip sharks attacks on people, but taking into account its size and sharp teeth, people should be cautious.

The Silvertrip shark is famous for its delicious meat and fins. Leather and lever are also precious.

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Dusky shark. 

The Dusky shark is found almost in each warm ocean or sea. In waters of the western side of the Atlantic it inhabits the coastal areas from Massachusetts toward Florida. It is often seen in the Caribbean, the Gulf of Mexico and in the coastal areas of Brazil. In the Atlantic Ocean the Dusky shark dwells in the region of the Canary Islands, Senegal and Sierra Leone. In waters of the Indian Ocean this sea predator is found in Mozambique, in the Red sea and near Japan and Southern Africa. The Dusky shark has a peculiar coloration of dark bronze. There are no bright patches or stripes on its body.

The Dusky sharks habits, life, breeding and bearing are the same as those of other representatives of its family. Small sharks are in constant danger of becoming an easy prey for elder species. Thus, a great deal of all newborn Dusky sharks never reaches puberty and, accordingly, cant propagate the species.

The Dusky shark is a very dangerous predator. Many occasions of their attacks at people are recorded. When people meet Dusky sharks, it usually ends tragically for the first ones.

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We described only a few species of Requiem sharks. Indeed, there are lots of them, but, to tell the truth, their habits are completely the same as of those that are described above.

The only difference between the species is that each of them has its own unique coloration, sometimes with patches and stripes.

It is amazing how alike some species are. Sometimes only an experienced specialist can tell one species from another.

It is remarkable that almost every species of Requiem sharks is very important to people. They continue hunting for these sea owners and predators because of their tasty meat, delicious fins, sturdy leather and useful liver.

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