DANGEROUS SHARKS
BULL SHARK
The bull shark looks similar to the Great White,
with a white belly and a grey back. The bull shark has tiny eyes
and long dorsal fins. The bull shark has rows of teeth that are
replaced when a row of teeth is broken lost, or, or worn down.
Bull sharks are usually seven to eleven feet long and can weigh between
two-hundred-five-hundred pounds.
A bull shark will eat mostly anything. They
are one of the most aggressive types of sharks and do attack humans
since they swim in shallow water. They also like to swim close to
shore and around lakes, estuaries, and rivers. The bull shark can
also withstand fresh water for a short length of time.
TIGER SHARK
The tiger shark has tiger-like markings on their
back and a white belly. They have large bodies and a blunt
snout. They also have a gill slit behind their eyes to all oxygen
to flow directly to the brain. They have a keen sense of smell
and electroreceptors that are sensitive to electric currents in the
water. These sharks also have exceptional eyesight. Tiger
sharks have serrated teeth that are razor sharp and curved. These
creatures eat anything they can find alive. They feed on turtles,
crabs, sea birds, reptiles, other sharks, mammals-ok, you get the idea,
these sharks are serious hunters. Tiger sharks live in tropical
climates, and swim both close to shore and out in the open sea.
GREAT WHITE
The great white, the one most people know about and
fear the most. The white shark is a ferocious predator has can
have up to 3,000 teeth. They grow twelve to sixteen feet
long. The longest recorded great white was twenty-three feet
long. Females are larger than males, and the pups can over five
feet long when born.
Young white sharks eat fish, rays, and other
sharks. Adults eat seals, whales, otters, and sea turtles.
They also eat dead animals floating on the sea. Whites do not
chew their food, they swallow things whole. The big meal can keep
a shark full for up to two months! These sharks use their sense
of smell and sense of electric charges. They can smell just a
drop of blood in twenty-five gallons of water. Also, the white
shark breathes through it’s gills, not the nose.
Sharks have a series of jelly-filled canals in the
head called the ampullae of Lorenzini, and they use this to sense
electrical discharges. This also allows the shark to sense tiny
electrical fields generated by animals. Sharks also have magnetic
fields for navigation.
These sharks can be found all over the world, along
the coastlines of the United States, including Hawaii, South America.
Australia and New Zealand, and the Mediterranean Sea, among other
places.