The largest living animal on Earth, the blue whale
The largest animal on Earth to date is the dinosaur, but the largest animal that has survived to this day is the blue whale.
There are about 90 species of whales in the ocean, and whales are not actually fish, they are mammals. Whale ancestors actually lived on land 60 million years ago, but rising sea levels forced them into the ocean and evolved to where they are today, but mammalian habits have survived. From this evolutionary process of whales, we can see the cruelty of natural selection and the twists and turns of evolution.
Whales are divided into two categories: toothed whales and baleen whales, and the dolphins described above belong to the toothed whales, which have a large number of teeth but no long whiskers, and of course, they are also very small.
Blue whales are the largest baleen whale species, they can be up to 30-40 meters long, weigh up to 190 tons, is not very large? They have about 800 keratinized whisker plates in their mouths, just like the numbers, when the blue whale eats, the sea water and fish and shrimp swallow it, and then close their mouths, the sea water withdraws, leaving only the fish and shrimp: don't underestimate this bite, you may eat 2-3 tons of fish and shrimp.
I have to introduce the lungs of the blue whale, which is a huge lung weighing 10.5 tons, and each breath inhales 1500 liters of air, which can only maintain the blue whale in the water for about 10 minutes. The blue whale has two large nostrils above its head and sprays water into a 10m-high fountain when exhaled, which looks spectacular.
Blue whales, which live mainly in deep-sea areas such as the North Pacific, the North Atlantic and the southern part of the icy ocean, are fond of eating krill, eating about 5-6 tons a day, if food is plentiful.
Blue whale estrus is usually in the spring when the temperature is warm, the gestation period is as long as 12-24 months, a fetus can only give birth to one blue whale baby, the newborn blue whale baby is 6-7m, weighing 7 tons, it is really a huge baby. Baby blue whales know that 60 months of growth is 5 years, and blue whales can only become adults.
Blue whales are treasures, fat is the raw material for refining high-grade lubricants, livers rich in vitamins A and D can make nutrient-rich cod liver oil, blue whale meat is delicious to make high-grade canned food, blue whale baleen is the raw material for making high-grade crafts. For these reasons, blue whales have become an important hunting target for humans.
In order to protect blue whales, countries need to be mobilized to hunt and kill them indiscriminately.
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