A shark is a very old animal
that has been around here for about 600 million
years and 200 million before the dinosaurs. They
looked very different a long time ago but thanks to
evolution they look like what they look like right
now. Not many years ago sharks were used for
different things like their skin is very rough so
it was used for sand paper before sand paper was
invented. In Florida their teeth were used for
hunting, before arrow heads were used. The shark's
liver has oil that was used for making pills like
vitamin A and other pills. Sharks also have very
outstanding senses like their eyes can see up to
distances of 50 feet but are sensitive to light and
there able to smell blood from about a mile away
using there very good nose and they can use
electricity to find prey because of organs called
Ampoolee of Lorenzini. These pick up little
electric waves, every fish and human give out a
weak electric wave and a shark is very sensitive to
those waves and it locks on to prey sorta like a
built in radar. Another cool shark fact is that
when they lose teeth it grows back over night.
There are 368 types of sharks
known to man, they are sorted into 30 different
families. Some sharks can live in oceans, rivers
and lakes. Sharks don't have bones, they have
cartilage, that's what your ear is made of. Some
sharks can be the size of your hand or bigger than
a bus. The whale shark is the largest shark in the
world the second largest is the basking shark. Some
sharks have flat bodies so they can hide in the
ocean floor. The whale shark, the basking shark and
the mega mouth swim real fast. They open their
mouths and eat all the fish and plants that come
their way.
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