CASTANEDA,+ERICK

Sharks


=Table of Contents= =Page 1...................................... Introduction= =Page 2...................................... What is a shark?= =Page 3...................................... The shark family= =Page 4...................................... Shark enemies= =Page 5...................................... Types of food do they eat?= =Page 6...................................... Where do sharks live?= =Page 7...................................... Sharks in dinosaur times= =Page 8...................................... Sharks teeth= =Page 9...................................... Shark population= =Page 10.................................... Defending themselves= =Page 11.................................... Bibliography= = =

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=Introduction= ==The reason why I choose this topic is because I would like to learn why sharks live so long and how they look. I also like the way how they eat their prey. I also have another reason, in the 16th century sharks were usually referred to in the English language as sea-dogs. The name "Shark" first came into use around the late 1560s.Sharks are the biggest predators in the sea. Sharks are fish. Unlike other fish, sharks have no bones. A sharks skeleton is made from cartilage,it is a type of bone that is less stronger than ours.Sharks are one of the oldest animals on Earth. They have been around long before dinosaurs roamed the Earth.==

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=What is a shark?=

A shark is a fish predator that is a carnivor which means a meat-eater.Sharks have been here before
==dinosaurs roamed the Earth.They are the most vicious animals in the whole wide world.The only way they attack is if you move or when you bleed and when blood is on you.It could easily kill you with just one bite.The most dangerous shark is the Great White shark.It is very big and strong.The reason why they call he/she Great White is because how his body is white.==

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=The shark family= == ==There is around 384 types of shark in the world.But I will only show a few.This is my type of shark the Hammer shark.[|http:www.prionace.it/paginafotoschedeENG.htm]== ==He or/she feeds itself by eating fishes, also eating his own species,and starfishes.They live about 20 to 30 years.Weight: 500 to 1,000 lbs.Sometimes Hammerhead sharks use there wide heads to protect themselves from predators.==

[[image:whale-shark-with-fish.jpg width="492" height="369" align="left"]]
==The last shark I want to talk about is the Whale shark.It is harmless but it mean damage and upset boats.He or/she has up to 3000-5000 small teeth.The Whale shark eats plankton.The face is wide,and flat.It also eats fish by opening he or/she's wide mouth.She carries her babies under her body.It is big as a school bus.SHARKS are the KINGS OF THE SEA!==

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=Shark enemies= =Some sea animals are not scared of a shark.Except having humans as there rivals sharks do have enemies.Sharks are also a meal to other large creatures.One of the shark's enemies are the Great squid.Another enemy is a Salt-water crocodile.They both are fierce shark hunters.Also Kiler Whales has been seen to swallow a shark.Even dolphins are the sharks enemies even though they are peaceful creatures.One technique of the dolphin is to swim full-speed towards at the shark and its gills.Which will give the ability for it not to breathe.In one case, there was an aquarium where a shark and several dolphins had been living together without difficulty for some time when the dolphins, for unknown reasons, threw the shark out 20 feet away onto the floor.But if analyze=

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=Types of food do they eat?= ===Young sharks feed on small fish and octopus that they can catch and chew for their shark food. However when sharks get older, their teeth are replaced with sharper and wider teeth so they can catch and break up bigger animals such as dolphins, seals and sea lions. Their shark food choices grow.Sharks harks have strange feeding habit of shark food.sharks look for===

[[image:shark3.gif align="right"]]
===shark food by attaching themselves to a whale, a dolphin or another shark with its strong lips.sharks then uses their small but sharp teeth to bite out a plug of flesh of their shark food. sharks also have been known to cause damage to submarines.Sharks sometimes mistake cables or parts of submarines for their shark food and attach themselves to underwater cables and submarine parts. This causes quite a lot of expensive repairs.=== =page 6= =Where do sharks live?=

-have a supply of water and salts in their bodies.Although skin and other living tissue looks solid, it actually has
==tiny pores in it.Small molecules such as water and salts can pass back and forth through the skin.But if there is more of one kind of molecule on one side of the skin than on the other,some of the molecules will move from an area of higher concentration to an area of lower concentration,though a natural calleddiffision.== =Page 7= = = == =Sharks in dinosaurs times= = =

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==For once there has been a discovery that sharks have been living before dinosaurs roamed the Earth.They say that this shark has eyes right next to its noes.They said it attacks its prey by using its fin then when it is open it tries to take a bite out of it.It has about 200 teeth.It can even bend steel.Archaeologist have found fossils of the old shark that have lived for millions of years.They said it died 100 millions of year ago.They found only hundreds of these fossils near the oceans.== =Page 8= =Sharks Teeth=

[[image:graysharkwrapthumb.jpg width="198" height="182"]]
==They even use there teeth as merchandise .They usually cost 3 to 5 dollars.There sometimes not that expensive maybe the are ones.There is fossil teeth too.They are the rarest ones.They have racer sharp teeth.Like I said those can hurt anything maybe even kill.== =Page 9= =Shark Population=

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==percent,Tiger shark population is down to 65 percent,thresher sharks by 80 percent.The population of Great white sharks have fell 79 percent,while Hammerhead sharks numbers dropped 89 percent.They will suggest to have a contract in North Atlantic because there is pure fishing cause of the population of sharks that live there.They said that in the next year it will be about 100 million sharks killed.Now Stradebroke island have killed 10,000 sharks this year.Many people now eat sharks,studies show that shark maybe healthy for you but not actually sure.They will maybe do a study of it next year.Sharks are around the world.== =Page 10= =Defending themselves= ==Some sharks use up alot of energy when swimming.Sharks have a spiky suit of armor.The most common shape of sharks teeth are triangle.When a shark gets threatened it go's in full speed and gets its snout in the way to bite the enemy.Then it takes a bite out of that enemy and waits ti'll it gets weakened.When its either hungry or not i still eats its enemy or prey.The young sharks are fast and quick it can easily dodge a human or an enemy.But adult sharks have to do what they==

could to not take any much damage.But when they are attacked fight back even to humans.
=Page 11= =Bibliography=