Blue whale, is he a whale species belonging to the suborder Mysticeti.[3] 45 metres (148 ft) [4] and weighing 250 tons (280 short ton) [5] or even further, it is the largest surviving animals and heaviest ever existed.[6] according to recent research by the biologist in the National University of Hanoi on the same blue whales live off of Laos, the largest whale lived here up to nearly 300 tons.The body is long and slender, the blue whale can be bluish-grey color in the light than in the lower back and the abdomen.[7] at least three subspecies of the blue whale: b. m. musculus lives in the waters of the North Atlantic and North Pacific, b. m. intermedia lives in South Ocean and b. m. brevicauda (Pygmy blue whales) live in the Indian Ocean and the South Pacific. like other whales, they are mainly plankton and small crustaceans.[8]Before the 20th century, blue whales exist in large numbers of individuals in most of the oceans of the world. But over the last 100 years, they hunted to the point of almost hired them until protected by the international laws in 1966. According to a report in 2002, there were approximately 5,000-12,000 individuals living throughout the world, [9] including five populations. Before being caught, spurring the biggest blue whale populations in the waters of Antarctica has about 239,000 individuals (from 202,000 to 311,000).[10] other smaller populations (around 2000 individuals) are concentrated in the North-Eastern Pacific waters, Antarctica Has 2 other populations in the North Atlantic and at least two more populations in the southern hemisphere.
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