The blue whale is the largest known animal that has ever populated the Earth. These majestic marine mammals dominate the oceans with their 30 meters in length and weighing up to 180 tons. Only his tongue can weigh as much as an elephant, and the heart, like a car.
Blue whales reach these exorbitant dimensions with a diet composed almost exclusively of an animal resembling a tiny shrimp, krill. At certain times of the year, an adult blue whale consumes about 3.5 tons of krill per day.
Blue whales, present in all the oceans of the world, usually live alone or in pairs, although occasionally they can be seen in small groups.
These graceful swimmers travel the ocean to more than four knots, but are able to reach 17 knots when they are restless. Blue whales are among the noisiest animals on the planet. They emit different pulses, grunts and moans, and it is believed that, under optimal conditions, blue whales can hear each other more than 1,500 kilometers away. Scientists believe that, in addition to communicating, they use these vocalizations, along with their excellent hearing, to navigate by sonar in the dark depths of the ocean.
Blue whales are among the longest living animals on Earth. It is estimated that the average longevity is between 80 and 90 years.
Blue whales have few predators, although it is known that they suffer attacks by sharks and killer whales, and many die or are injured when they hit large ships. Currently, blue whales are classified as an endangered species on the Union Red List for World Conservation.
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