Is the blue whale the largest animal in the world? With detailed information

Everyone is familiar with the blue whale, a marine creature; whether in books or on television programs, there are related introductions to it. The blue whale's size is enormous, and it is also the overlord of the ocean, so is the blue whale the largest animal in the world? Is there related information introducing it? What are its natural enemies?

1. Is the blue whale the largest animal in the world?

At present, the largest known animal in the world by weight is the blue whale, weighing up to 181 tons. The blue whale's body is so huge that a single tongue weighs 2000 kg, the skull weighs 3000 kg, the liver weighs 1000 kg, the heart weighs 500 kg, the blood circulation volume reaches 8000 kg, and the testes of a male also weigh 45 kg. If its intestines were straightened out, they would be fully 200-300 m long; its blood vessels are thick enough to hold a small child, its organ walls are more than 60 cm thick, and the penis of a male is up to 3 m long. Its strength is also astonishing; the power it generates is about 1500-1700 horsepower, making it a veritable strongman in the animal world.

The blue whale is distributed in the major oceans of both the Northern and Southern Hemispheres, from the Antarctic to the Arctic, with particularly high numbers in the oceans near the Antarctic, but it is relatively rare in tropical waters. In China it is found in the Yellow Sea, the East China Sea, and the South China Sea, including the waters of southern and southwestern Taiwan, China. Despite its enormous size, it usually moves slowly and often remains motionless, yet it can rise and dive freely in the water, its tail swinging nimbly; it is both the driving force for forward movement and serves as a rudder, with a forward speed of up to 28 km per hour.

During millions of years of evolution, whales not only grew larger, but grew larger at an extremely rapid rate.

Alistair Evans, an evolutionary biologist at Monash University in Australia, said: “We believe there are two key reasons that can explain why whales grew larger faster during evolution than other mammals.”

First, because they live in water, the pressure their bodies bear in water is much less than on land; that is, physical principles played an important role in this process. If a blue whale could still maintain its weight in water while on land, its legs would be unable to bear the weight of its body (if it had legs), and moreover, its internal organs would be crushed by its heavy body.

Another reason is that some tiny organisms helped whales grow into huge animals. The blue whale belongs to the baleen whales, (the order Cetacea is mainly divided into two suborders: baleen whales and toothed whales; baleen whales have fewer species but huge bodies; toothed whales vary relatively greatly in body shape, differing by species) and this kind of whale can use the baleen plates on its upper jaw to filter small marine organisms (such as krill) out of seawater.

2. What are the blue whale's natural enemies?

1. Orcas

Orcas are toothed whales among the cetaceans and the top predators in the ocean. When orcas appear, sharks can only step aside! Moreover, orcas have extremely high intelligence; compared with sharks, the difference is like that between an adult and a child! Of course, orcas have another name that may be even more famous: “killer whale” is their second resounding title, but in fact orcas have no record of attacking humans in nature; only orcas kept in captivity in aquariums have such records, and this may be related to the state of orcas being kept in captivity for decades!

Compared with the blue whale in body size, the orca looks like a little younger brother!

But orcas rarely attack adult blue whales; they attack calves. Orcas cooperate with one another to isolate the mother whale from the care she provides to the calf, so that they can attack in a group and quickly kill the calf! Therefore, in this sense, it is not excessive to say that orcas are a threat to blue whales, but it is not quite appropriate to call them natural enemies, since with the abilities of orcas they still cannot reach that level!

2. Humans and the garbage produced by humans

In fact, humans threaten the survival of all species. Of course, most civilized countries adopt very gentle measures to protect species on the brink of extinction, but on Earth there are often a few that, in order to satisfy selfish desires, disregard the threat of species extinction and frequently act to kill whales.

In addition, there is more and more marine garbage, which is also driven by human tourism. Some ill-mannered tourists throw garbage onto the beach, and over time, white pollution will also be accidentally eaten by whales.