Sharks

sharks

The shark history

In some form, sharks have been around for about 400 million years. They are the top predators of the ocean's natural food chain.

Even before dinosaurs roamed the earth, sharks hunted through the oceans! They're such good survivors that they've had little need to evolve in the last 150 million years.There are over 400 types of sharks -- at least 30 of these species have been known to attack humans. They range in size from 6 inches to 45 feet.

When you think of sharks whats the first shark that pop’s into your mind?

Where you thinking something this or like this:

THE ANGEL SHARK ???

WOBBEGONG SHARK

THIS SHARK IS NO ANGEL HE HIDES UNDER THE SAND LIKE THE WOBBEGONG AND THEN ATTACK THERE PRY

Shark teethSharks have the most powerful jaws on the planet. Unlike most animals' jaws, both the sharks' upper and lower jaws move.A shark bites with it's lower jaw first and then its upper. It tosses its head back and forth to tear loose a piece of meat which it swallows whole. Each type of shark has a different shaped tooth depending on their diet (the shark in the photo is a great white -- you can tell he's a carnivore just by looking at those sharp, pointy teeth!). A shark may grow and use over 20,000 teeth in its lifetime!Sharks never run out of teeth. If one is lost, another spins forward from the rows and rows of backup teeth.

In fact when you look at the shark you might see only one row of teeth but in reality you see something more or less like this :

Shark teeth are most probably to fall out so the have extra rows of teeth so they have enough , it means when a tuth falls out automaticly another tooth will ocupy his place like this

TIME TO EATNormally, sharks eat alone. But sometimes one feeding shark attracts others. They swim up as quickly as possible and all begin to try to get a piece of the prey. They bite wildly at anything that gets in their way -- even each other.BUT WHEN WE USUALY SPEAK ABOUT SHARK EATING YOU REARLY SEE SHARKS “ SEARING “ A WHALE CARCASS THEY SWIM UP TO IT THEN THEY TAKE THE BIGEST BITE THEY CAN

They live on a diet of fish and sea mammals (like dolphins and seals) and even such prey as turtles and seagulls.Sharks even eat other sharks.

GENTLE GIANTS

Not all sharks are fierce carnivores. Some are quite harmless. Oddly enough, the most harmless sharks tend to be the largest! The basking shark , the whale shark and the megamouth sharks all fit this description.These huge sharks eat plankton, a tiny shrimp-like creature found in the ocean. To do this, they swim forward with their mouths wide open. "Gill rakers" at the back of their throat strain the tiny food from the water.

DANGEROUS

PREDATORSThink sharks are dangerous? The most dangerous sharks are the Great White shark, the Tiger shark, the Hammerhead shark, the Mako shark and the Bull shark. On average, there are only about 100 shark attacks each year and only 10 of those result in a human death.You should check it out from their perspective, though! People kill thousands of sharks in a year for sport and for food. Shark skins are used to make products like any other leather would be. Up until the 1950's, shark livers were used as a vitamin A supplement. Shark fin soup and shark steaks are both eaten in many countriesSo... Who's the dangerous predator?

TYPES OF SHARKS

BASKING SHARK:

BLACKTIP REEF SHARK

BLACKTIP SHARK

BLUE SHARK:

BULL SHARK:

COOKIECUTTER SHARK:

GREAT WHITE SHARK:

HAMMERHEAD SHARK: