How big is the blue whale, how much does it weigh, and what kinds of whales are there?

Different types of whales have different weights. Blue whales can be called "the largest in the world". An adult blue whale weighs about 181 tons.

The calf of a blue whale is about 7.5 meters long and weighs about 6 tons.

The sperm whale weighs about 500 kilograms; the humpback whale weighs 25 to 30 tons; the killer whale weighs about 9,000 kilograms.

Extended information:

Cetaceans are completely aquatic mammals. Their appearance looks very similar to fish. Their body length is generally between 1 meter and 30 meters, and their skin is exposed. , only the snout has very little hair, and there is thick fat under the skin. These fats help maintain body temperature, and when they live in the water, these fats reduce their body weight, making it easier for them to swim.

Cetaceans are 1 to 30 meters long, fish-like in shape, with exposed skin, only a few hairs on the snout, and no sweat glands or sebaceous glands. The forelimbs are fin-shaped, and the hind limbs are completely degenerated, with only a pair of small bone fragments remaining in the body. The skin at the end of the tail expands left and right to form a horizontal caudal fin. There is no auricle, because there is a thick layer of fat under the skin, which can keep the body warm and reduce the body's specific gravity, which is conducive to swimming.

Some species have dorsal fins. The eyes are small, have no nictitating membrane, and have no tear glands, and their vision is poor. There are 1 to 2 external nostrils, located on the top of the head, commonly known as the blowholes. Although there are no auricles, the hearing is sensitive. There is one lobe on each side of the lung. Breastfeeding in water. The stomach is divided into 4 chambers, and the average life span is 50 to 100 years in the natural environment.

Cetaceans are completely aquatic mammals, and some mainly rely on echolocation to find food and avoid enemies. They generally feed on molluscs, fish and zooplankton, and some species can also prey on seals, fur seals, etc. Every once in a while, you need to breathe. Generally, they swim from high-latitude cold water areas to low-latitude hot water areas to give birth in winter, and then swim from low latitudes back to high-latitude cold water areas to hunt for food in summer.

The blue whale is a marine mammal belonging to the suborder Baleen whales. ***There are four subspecies. The blue whale is considered to be the largest animal known to have ever lived on earth, reaching a length of 33 meters and weighing 181 tons. The blue whale has a slender body and a bluish-gray back, but the color sometimes looks lighter in the water.

Like other baleen whales, blue whales feed mainly on small crustaceans (such as krill) and small fish, sometimes including squid. Usually blue whales need to forage in sea areas with a depth of more than 100 meters during the day, and can only go to the surface to forage at night. Blue whales begin mating in late autumn and continue until the end of winter. Female whales usually give birth once every 2-3 years. After a gestation period of 10-12 months, they usually give birth to calves in early winter. It is distributed in the four oceans.

Baidu Encyclopedia - Whale

Baidu Encyclopedia - Blue Whale