The Black Shark.

The White Shark nostrils are very narrow, and the eyes are small,
circular and completely black. On the sides are placed five gill slits,
two triangular-shaped pectoral fins and two near the tail fin, much smaller.
The flow is well developed, as well as the large dorsal fin on its back.

We also have two small fins near the tail. They have the white ventral and dorsal gray or bluish.

It is an endangered species. Causes: why are in this category by reducing their
food sources, excessive commercial exploitation, and catch
"Sport" on the part of hunters to obtain parts of the animal trophies or commercial interests.
Actions we can take to conserve this species
has already been declared the White Shark as a protected species,
and although legislation has been enacted protectionist,
some do not comply, therefore, should increase surveillance in the seas.

The white shark population is

very susceptible to overfishing

because sexually mature after 9 to 10 years old and only has a maximum of 7 pups once, 

with very prolonged pregnancy  (12 months) so not all years played.

  

The jaws and teeth
are the most valuable o
f the white shark trade.
These trophies and 
curios are available for
sale on Internet trading
sites costing up to US$425 for
a tooth and up to US$50,000
for a couple of big jaws.

The white shark has no natural enemies when it reaches adulthood. But when they are young they have two natural enemies, orca whales and other sharks.
The other enemy of sharks is man. Man kills fish and unjustified, given the information provided by the media. Because the movies, which put the white shark as a threat to humans. This has led to over-fishing and smuggling of the dentures, flippers and oils of this species.

  

The world's largest shark is fished illegally to trade with their jaws, teeth and fins, best-selling and ordering products worldwide.Sharks are also threatened by fishing accidentally in fishing
nets and those who survive are killed for trade.

The sharks
are in danger
extinction because
the human blings
kill many sharks.
In Japón their
favourite dish is
the shark fin and
more of it's parts.