The blue whale looks very huge, but it has an elongated and slender body. This whale's large head is equipped with small eyes and a sharp snout with a broad lower jaw. The blue whale has a blowhole from which it blows a vertical fountain of water up to 10 meters high. On the head before the blowhole, the blue whale has a prominent longitudinal ridge called a "breakwater. The blue whale has a dorsal fin which is strongly displaced backwards. This fin is very small and shaped like a pointed triangle. The posterior edge of the whale fin is covered with scratches that form an individual pattern in each whale. Researchers can distinguish each individual by these patterns. This fin is only 35 cm long. The blue whale has narrow, elongated pectoral fins that reach up to 4 meters in length. The blue whale's caudal fin reaches up to 8 meters in width, it has a thick tail stem and a small notch. All of these elements help the blue whale easily control its large body in the water.
The blue whale looks very unusual because of its longitudinal stripes. Like all baleen whales, the blue whale has many longitudinal stripes on the underside of the head, which continue down the throat and belly. These bands are formed by folds in the skin and help the blue whale's throat stretch when it swallows a large volume of water and food. Blue whales usually have about 60-70 such bands, but sometimes more. The blue whale is the largest cetacean at this time. The blue whale is also the largest animal on Earth. The size of the blue whale is enormous and makes a strong impression. Giants 30 meters long and weighing over 150 tons are amazing. In blue whales, females are slightly larger than males. The largest blue whale is known to be female, which was 33 meters long with a body weight of 190 tons. Among males, the largest blue whale weighed 180 tons, with a body length of 31 meters. Huge blue whales over 30 meters long are extremely rare today. Therefore, in our time the blue whale's length has decreased somewhat. At the same time, the mass of the blue whale has also become slightly smaller. Male blue whales vary in length from 23 to 25 meters. Blue whales with females range in length from 24 to 27 meters. The weight of the blue whale is as astounding as its length. The weight of the blue whale ranges from 115 to 150 tons. Those in the Northern Hemisphere are a couple of meters smaller than those in the Southern Hemisphere. The great blue whale's eyesight and sense of smell are poorly developed. But their hearing and touch are excellent. The great blue whale has a huge volume of lungs. The great blue whale's blood volume is over 8,000 liters.
The blue whale's tongue weighs up to 4 tons. Despite these impressive numbers, the blue whale's throat is narrow, with a diameter of only 10 cm. The blue whale's heart weighs a ton and is the largest heart in the entire animal world. However, its heart rate is usually 5-10 beats per minute and rarely more than 20 beats. The skin of the blue whale appears smooth and even, except for the stripes on the throat and belly. Blue whales have little or no growth of various crustaceans, which often settle on other whales in large numbers.
The blue whale looks rather monotonous. It has predominantly gray skin coloration, with a blue tint. Sometimes the blue whale looks more gray, and sometimes its coloration has more blue tones. The blue whale's lower jaw and head are the darkest, the back is lighter, and the sides and belly are the lightest throughout the body. Blue whales have gray patches along their body with varying shapes and sizes. You can distinguish one whale from another by these spots. This coloration makes the blue whale look like it is made of marble. In the tail, the number of spots increases. The pectoral fins of the blue whale are much lighter in color on the inside than the rest of the body. However, the underside of the tail is much darker than the rest of the body. Through the water column, this whale looks completely blue, which is why the blue whale is called a blue whale.