The blue whale is not only the largest whale, but also bigger than the largest dinosaur that has ever lived on earth. It is the largest of all known animals since ancient times. It is generally 2400-3400 cm long and weighs150,000-200,000 kg, that is, its weight is equivalent to more than 25 African elephants, that is, 2000 kg. Fortunately, because of the buoyancy of the ocean, it doesn't need to support its weight as hard as land animals, and its huge body helps to keep a constant body temperature. The whole body surface of the blue whale is light blue or mouse gray, with thin stripes on the back, white spots on the chest and more than 20 folds, and the abdomen is covered with folds all the way to the navel with ochre spots. Female animals have cleavage on both sides of the reproductive opening with slender nipples inside. The head is small and flat, with two spray holes on the top of the head, a wide mouth, no teeth in the mouth and a wide upper jaw. It bulges upward in an arc shape, with 300-400 black whiskers on each side, 90-110cm long and 50-60cm wide. A large amount of earwax accumulates in the eardrum every year, and its age can be judged according to its thickness. It also has a white callus on its upper jaw, which used to be a place for long hair. Later, the hair degenerated, leaving a warty vegetation and becoming a breeding ground for parasites. Because this callus is different for each individual, just like wearing a hat with a different shape, different individuals can be distinguished accordingly. The dorsal fin is extremely short, the length is less than 0.5% of the body length of 65438+, and the flipper limb is not too long, about 4 meters, with four toes, no wavy notch at the back edge, and a wide and flat tail. The whole body is streamlined and looks like a razor, so it is also called "razor whale". The blue whale's body is so huge, one tongue has 2000 kilograms, the skull has 3000 kilograms, the liver has 1000 kilograms, the heart has 500 kilograms, the blood circulation reaches 8000 kilograms, and the testicles of male animals also have 45 kilograms. If its intestines are straightened, it is 200-300 meters long, its blood vessels are thick enough to hold a child, its dirty wall is more than 60 centimeters thick and its penis is 3 meters long. Its power is also amazing, and its power is about 1500- 1700 horsepower, making it a well-deserved Hercules in the animal kingdom.