Blue whale is a marine mammal, but also the largest existing animal in the world today, an adult blue whale body length is generally 22-33 meters, the weight can be as high as 150,000-180,000 kg, equivalent to the weight of 2000-3000 people, only a tongue has a weight of 2 tons, the buoyancy of the ocean is very large, therefore, it does not need to struggle to maintain its own body shape, and the huge body size for the maintenance of body temperature also has a certain help, the blue whale's body surface is generally light blue or gray, There are wrinkles and markings on the back and abdomen, white spots on the chest, a small head, two air vents, a large mouth but no teeth, 300-400 black whisker plates on the upper jaw, and a intestine that is two or three hundred meters long if straightened.

Blue whale has four stomachs, the esophagus is inflated and formed is the first stomach, which also determines its incomparable huge amount of food, a day needs 4-8 tons of food, mainly fish and shrimp, jellyfish, diatoms, etc., a time can swallow about 2 million krill, it as long as it opens its mouth in the dense plankton bush around a circle, it will ingest a large number of organisms, and then use the whale baleen board to discharge the swallowed seawater, the amount of food intake is amazing, the grand scene of excretion can also be imagined, almost fifty meters in radius can not be spared, The sea water changes color immediately and cannot dissipate for a long time.
However, this does not pose a threat to the marine environment, which contains a large number of elements needed for the growth of marine life, is the cuisine of many small marine organisms, due to the tender taste of blue whale shark fins, has been killed in large quantities, and now has become one of the endangered species, serious marine pollution has even led to the collective suicide of whales, that tragic scene is really sad! It's time for action.