Hello everyone, I am a blue whale swimming happily in the sea. Maybe many people think I am a very big fish, but you guessed wrong. I am not a fish, but a mammal. We whales, like cattle and sheep, breathe with our lungs and are viviparous. Young whales grow up by feeding on the mother whale's milk, which shows that we are mammals. My body is spindle-shaped, almost blue-green, my abdomen is light gray, and there are many white spots on my side. I like nutritious krill best. I can eat more than 2000 Jin in one meal. I usually swim faster, and the speed can reach 8 ~ 12 nautical miles per hour. When I run away, I can swim faster than 30 nautical miles per hour.
Our blue whale is the largest animal in the world. It is generally 24 meters long and weighs more than 150 tons. My father is the biggest blue whale. Its body length can reach 33 meters and its weight exceeds 190 tons. A tongue weighs 4 tons, enough to fill a big truck. Just open its mouth and let a dozen adults in and out freely. Our weight is equivalent to the weight of 32 elephants and more than 300 cows. It takes five train carriages to transport a blue whale.
Our nostrils grow on the top of our heads, and when we exhale, our nostrils will surface. The air ejected from our nostrils forms a water column, and the maximum water column we eject is10 ~15m. If you see that the water column ejected by whales is vertical, thin and high, it is our baleen whale; If the spouted water is inclined, thick and short, it is a toothed whale. Some people can judge our kind and size according to the shape of the water column.
We are all treasures with high economic value. Due to our huge size and abundant oil, whale hair, whale skin, whale bones, whale meat and internal organs can be used as raw materials for industry, light industry and food processing industry. So humans are hunting us, which leads to a sharp decline in our number and is on the verge of extinction. The living environment of human beings is constantly expanding, and the area where our whales live is also shrinking. Coupled with the deteriorating marine living environment, there are only 200,000 blue whales left in the world. Although the killing of blue whales has been completely banned all over the world, there are still people who are crazy about killing them, so on behalf of our whale family, I appeal to the world: human beings, don't kill us again! The earth is our home and we have the right to live on this blue planet!