- Blue whale ≈ 150 tons
The largest animal on Earth is a majestic, carnivorous sea creature that weighs a whopping 150 tons and reaches 33 meters in length. This is still on average, since whalers encountered 180-ton and even 190-ton whales. The heart of a blue whale is one and a half meter in size, weighs about 180 kilograms, and its aorta is wide enough for a baby to swim through it. However, despite their gigantic size, blue whales are not dangerous to humans. They do not attack swimmers and feed on krill, small crustaceans, cephalopod and fish. Man for a blue whale is the most dangerous enemy. Due to active whaling and severe pollution of the seas, the largest animal in the world almost disappeared. In 1693, only 5 thousand individuals remained. Although now the population of the blue whale has grown to 10 thousand individuals, it is still on the verge of extinction
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