Blue whales in danger of extinction

It is the largest whale species that exists and also the largest animal that has lived on Earth. At birth they are about 7 meters and along a visa may exceed 30 meters in length, with sizes slightly higher in females than in males. Their weight ranges between 80 and 130 tons. It inhabits all oceans of the world.Your belly may have a grayish or yellowish due to the presence of algae that attach to it. Its top and sides range from blue to blue-gray color.His head is very long and thin, U-shaped and uniform color. Its body is elongated, with a small dorsal fin, triangular in about 30-35 cm high.

The baleen hanging from the upper jaw and are used to filter water crustaceans. Has between 270 to 395 pairs of black baleen of 1 cm. long and 30 cm. wide.
At the top of the head has two holes called blowers, which allow them to breathe. It is customary to expel air and water through these holes, producing vaporized water column up to 9 feet.The blue whale is usually a solitary animal, as an exception, in foraging or reproductive periods can be seen three or four copies together.Their diet is based on plankton and small fish, like other baleen whales.The play takes place in the warm waters of the tropics and surrounding areas. The blue whale birth to a single calf every year, staying with the mother for almost another year.
 Blue whales produce low frequency sounds, which can be heard 160 km away. This form of communication has been studied by scientists and may indicate that a group of these animals can occupy a very large area in the ocean.The identification of each animal of this species is normally done by their dorsal fins, which are proportionately small, and different in each individual.Currently, the estimated world population of 11,200 copies, very small given that initially there were about 200,000.The blue whale was the target of many fighters between 1930 and 1960. therefore, the species went through difficult times on the verge of extinction. In 1960 1960 the International Whaling Commission (IWC) banned the game, and since 1966 is protected.