Sharks

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What is sharks?

Sharks belong with roggen and sea cats to the cartilage fish. These fish have skalet that have been built from cartilage. Cartilage is a rather smooth flexible leg type and it is the ear shell and find the puntje of the nose at people for example in.

Length of the shark.

The largest fish in the world is the whale shark and he is possible, however, 18 meters long becomes. They are possible also once more 7000 kilogrammes ways. Happy he is inoffensive because he eats only plankton - small vegetable and animal food. The smallest shark is the pygmeehaai which but 25 cm become long.

Thousands of years suffered products sharks the most attentive fish in the sea and the oceans. Then also the largest shark type lived who has roamed round ever. That huge animal was approximately 36 meters long and had sharp triangular cogs of almost 15 centimetres long. That type for a long time no longer exists, toch the shark is still the largest fish.

Dangerous?

Sharks have to be the name perilous, and they will have especially a preference for bloody man flesh. Is nevertheless there of the 375 well-known shark types only some really dangerous for us. Most of the sharks like no man flesh. The sharks which are for people dangerous, are the large hammer shark, the tiger shark, the sand shark, the man shark and the blue shark.

For this reason but these sharks almost never come in the buurt of the coast and are almost never a threat to swimming people. Sharks are especially attracted blood in water, which can smell them on very large distance. At a place where a wounded animal or people in sea lies, rapidly a large number of sharks collects himself.

Body construction.

Almost all sharks have a streamlined body. As a result, are possible they itself rapidly and easily by water move on. Their borstvinnen are rather large and serve for the balance. The staartvin of the shark are not, therefore not on both sides right symmetrical.

The upper part of the vin is a piece longer than the lower part. Some fast sharks, such as the white shark, can reach a speed of kilometres, however, 40 per hour. If sharks swim quietly, they do this with a speed of 1 up to 3 kilometres per hour.

The sharks cogs,

If we are approximately five years old we let us change our milk cogs. That happens but a time, losses we afterwards a cog then grows that never more. . Sharks have of this no charge. As its a cog losses, and that best frequently happens, then they get simply new. Sharks have, as it happens, a lot of cogs in the mouth, which ranges in behind each other stands. If a cog from the first file demolishes then it are replaced these by a new cog from the file. The new cog schuift therefore plaatsje forward. Some sharks have even 3 or 4 reserve cogs range. The shark does approximately 2 weeks with 1 cog and never wears out there during its life a couple 1000. you a shark without cogs seeing. Sometimes you find a shark cog on the range sometimes.

Skin,

Sharks have no scales. The skin of the shark is covert with huidtandjes (have small stekeltjes that the same advancement as the cogs in the mouth). The skin of some sharks is this way harsh that he is used as barn paper.

Sensitive,

Sharks have exactly in the breaches what happens there for them.

Have to them a sharp nose, start them smell almost everything. But they feel also complete good, even the smallest ultrasounds in water. This is possible them because they have special bodies on the they side of their lijf and head. No fish or plunger comes in the buurt or the shark sees it. Sharks have a special feeling with which they is possible complete well prey animals on go by rail on their head.

Food,

All sharks are carnivore, they eat only other sharks smaller animals which live on the floor food all kinds of floor animals e.g. scratch, inktvisjes platvissen but also fish are eaten. A number of large preys such as turtles, also large at food, other sharks, dolphins and seals several types sharks:

The tiger shark:

An omnivore. He likes turtles, sea lions, detritus and still more. Also tiger sharks seize sometimes a gull from water. For people the tiger shark is dangerous. Of its skin one makes leathers and from the liver liver tear is prepared.

The giant shark:

Giant sharks see griezelig, but for people they are rather inoffensive. Them incline to with their mouth open to catch vegetable and animal food from water.

The blue shark:

With people. Lives especially in the warmer sea? sometimes also in the North sea, but almost never in shallow water. Blue sharks gladly hunt on schools mackerel and tuna. Fishermen are with that not always glad.

The white shark:

(Also people shark called). People shark. Most dangerous of all, especially to the Australian coast people the victim has become of these for the. He devours of everything. Even number nummerborden of auto.s are found in its flatulence.

The Buldoghaai:

This shark frequently comes in the buurt of ports to the Indian ocean or to the African coasts. He succeeds well luck boats, to eat the restjes to which are overboard thrown.

The fox shark:

He is called this way by its long tail. He hunts on schools fish, by swimming to always smaller circles gone. Thereby he bounces with its tail to the fish, which remains in panic at each other.

The ordinary hammer shark:

Sees complete oddly. Its head seems indeed a beetje on a hammer. On from end of it the eyes and nose breaches sit. Most of the types live in full sea.

Shark on your bord!

Sharks are long not all this way large. The spotted dogfish is smaller than 1 meter. He lives on the sea floor, also in the North sea. Perhaps you have sometimes eaten spotted dogfish. Sometimes they lie in the fish shop and are called then "conger". Also for haaienvinnen soup several types sharks are caught.

Here under I have a couple photograph of haaienbeet, this man has survived it.

Look on my lions site

photograph

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