Prehistoric Extinct Sharks
SHARK CHAT FORUM
Threat Level: High
- TIGER SHARK
Scientific Name.... Galeocerdo Cuvier
Family Name...... Carcharhinidae
- General Information: The tiger shark is the
second largest of the three most dangerous sharks in the sea.
It was named for the way it looks like a big cat, the adult tiger
shark has stripes on its back. The tiger shark and the big cat's
attitudes are very much alike as a swift and powerful killer.
Its Latin name Galeocerdo, means " cunning, " Its wide
mouth, broad nose, barrel chest, and the slenderness at the base
of its tail is distinctive.
- Size: Tiger sharks average 10 feet long, with
some growing as long as 20 feet.
- Teeth and Jaws: Tiger Sharks have triangular
shaped teeth, which are serrated (saw-edged) and extremely sharp.
These teeth are located in several rows inside the bull sharks
jaw. The first two rows of teeth are used in obtaining prey, while
the other rows are kept in reserve to rotate in as needed to replace
lost or broken teeth.
- Color: This shark has tiger like markings (hence
the name) against a dark grey back and an off-white underbelly.
Pups are not born striped, but spotted instead. these spots then
fade into stripes as the young sharks mature.
- Feeding Habits: A tiger shark will eat just
about anything that it can catch alive, and it is considered to
be one of the most fiercest predators in the sea of all
sharks. Such as fish, turtles, crabs, clams sharks smaller in
size, mammals and reptiles, it also eats birds that rest on the
surface of the ocean such as pelicans and migratory birds. Tiger
sharks have also been called the swimming trash cans, these are
just some of the things that have been found in a tiger shark's
stomachs. Tin cans, shoes, bottles, bolts, license plates, alarm
clocks and straw hats.
- Senses: Like all sharks the tiger shark depend
on their senses to survive and find food. Tiger sharks have good
eyesight, aided by a special gill slit ( a spiracle ) right behind
the eye, which provides oxygen flow directly to the eyes and brain.
It has electroreceptors sensitive to electric currents in the
water, and a very good sense of smell. Tiger sharks have a special
protective eyelid called the third eyelid or nictitating membrane
that can close over the eye protecting it from fighting prey.
- Social Behaviour: Tiger sharks are solitary
except during mating. Adult tiger sharks are active at night and
enter shallow reefs and lagoons after dusk to feed. Usually during
the day they occupy deeper water beyond the reef edge to depths
of about 500 feet.
- Habitat | Migration | Distribution:
are found in tropical waters worldwide, and in some temperate
seas as well. Is known to tolerate a broad range of different
habitats. They can be found from the surface down to as far as
1,200 feet below, and inhabit both shoreline and open waters,
ranging as far as 500 miles.
- Life Span: The lifespan of the Tiger Shark
is uncertain, but approximately 30-40 years.
- Reproduction: Tiger sharks reproduce viviparously,
which means that like mammals, they give birth to live young that
have been nourished by a placenta. The male tiger shark Litters
can be made up of anywhere from 10 to 82 pups, and gestation is
about 9 months long. At birth, pups are 20-30 inches long and
are completely independent. The spotted pups are ready to swim
- Swimming: Tiger sharks have an average speed
of 2.4mph. they can swim in fast bursts, but the speed can only
be maintained for a few seconds.
- Tiger Shark Attacks: The tiger shark is greatly
feared by humans and does occasionally attack people, but people
are not sought out by sharks.
- Attacking Prey: Generally tiger sharks are
sluggish but can move quickly when they spot dinner. A tiger shark
circles its prey for a long time before attacking. It watches
its prey and then bump it with its snout or fin and then it attacks
very quickly. The tiger sharks upper jaws are not attached to
the skull so when the shark is ready to bite, it can push its
jaw forward to grab the food. The shark stabs its prey with its
lower teeth, then uses the teeth in both jaws to saw off slabs
of meat. It swings its body side to side for more slicing.
- Population Report: Not threatened.