The blue whale (scientific name: Balaenoptera musculus) is a marine mammal in the family baleen whales. There are 4 subspecies. The blue whale is considered to be the largest animal known to have ever lived on the earth, reaching a length of 33 meters and weighing 181 tons. The blue whale has a long, thin body and a bluish gray back, but it sometimes looks lighter in the water. The blue whale's flippers are 3-4 meters long. Gray above, white on narrow sides. All white below. The head and caudal fins are generally gray. But the back and sometimes the flippers are usually variegated.

As the largest living animal, it is a giant in the ocean. The body is streamlined, with a deep blue gray back and a shallow abdomen with white spots and over 20 folds. The entire body resembles a razor, hence it is also known as the "razor whale". The head is relatively small and flat, with two jet holes located on the top of the head. Their mouths are huge, without teeth, but they have 300 to 400 black whiskers. The power of blue whales is astonishing, emitting approximately 1500 to 1700 horsepower. The appetite is huge, consuming 4000 to 8000 kilograms of food per day, mainly consisting of krill. Distributed in all oceans around the world.

It is the largest known animal on Earth, belonging to the whale order, baleen whale family, and has a gentle personality. Known for its enormous size, adult blue whales can grow up to 25 to 30 meters in length and weigh around 200 tons. The body color is usually deep blue or gray, with a lighter belly. Having a huge head and wide jaw, as well as a U-shaped mouth, it can filter and feed on large amounts of krill and other small marine organisms. They have a wide distribution range and can be found in oceans from the Arctic to the Antarctic, but they prefer colder waters. It is a mammal that needs to regularly float and breathe, and its huge jet holes can spray up to 12 meters of water column.

It is currently the largest known animal on Earth and belongs to the family of baleen whales. Known for its enormous size and length of 25 to 33 meters, it can weigh up to 150000 to 180000 kilograms. The streamlined body helps them swim quickly in water. The skin appears light blue or mouse gray, with markings on the back and wrinkles and yellow spots on the abdomen. They don't have teeth, but instead have whiskers to filter food, mainly feeding on krill. Blue whales are distributed in the oceans around the world, especially in the Antarctic region where they are most abundant. It is an endangered species that is under international protection and hunting is prohibited. Blue whales have a long reproductive cycle, giving birth every 2 years.

Blue whale is a marine mammal belonging to the family of baleen whales and the genus of baleen whales. There are four subspecies in total. The blue whale is considered the largest animal known to have lived on Earth, measuring up to 33 meters in length and weighing 181 tons. The body of a blue whale is slender and long, with a bluish gray back, but sometimes it appears lighter in water. The fin limbs of blue whales are 3-4 meters long. Above is gray with narrow white edges. Below is completely white. The head and tail fins are generally gray. But the back and sometimes the fins are usually mottled.

Blue whale is a marine mammal belonging to the family of baleen whales and the genus of baleen whales. There are four subspecies in total. The blue whale is considered the largest animal known to have lived on Earth, measuring up to 33 meters in length and weighing 181 tons. Usually, blue whales need to forage in waters deeper than 100 meters during the day and can only reach the surface to forage at night. Distributed in all four oceans.