There are dead whales off the coast of Dalian. Fishermen found them and dragged them ashore. Why are whales always stranded?

At present, according to human cognition, the largest mammal in the world is whale. As giants in the deep sea, it is reasonable to say that they will never swim to the shallow sea, let alone commit suicide collectively. However, recent incidents such as collective suicide and stranding of whales often occur in coastal areas, which makes people wonder why whales commit suicide.

There are many reasons, such as marine pollution, sonar noise, geomagnetic interference, solar activity or straying into shallow sea, which will lead to whale stranding. Let's talk about how these reasons lead to the stranding of whales.

Sonar noise, you know, the visibility in the deep sea is very low, so whales move through sound when looking for food, communicating or navigating. However, with the increase of human activities, there are often many ships at sea, some fishing and some transporting, but they all inevitably use an instrument sonar to fish or navigate through sonar, and this sound often leads whales to stay away from their habitats, and their ears and internal organs will also be damaged by noise, which will eventually lead to stranding and death.

Marine pollution, a marine biologist found more than 30 plastic bags and other human-generated garbage in a stranded whale. These garbage can't be digested in the whale, occupy its body, torture it day and night, and finally run aground and have to be euthanized. It is recognized that the ocean is vast and blue, just like the blood of the earth, but because of this, blood also contains impurities. In modern times, the scope and extent of human activities on the earth are increasing, and sewage and garbage are discharged everywhere. You may find that the river used to be crystal clear, and you can often see small fish and shrimp, but now it has become a place that everyone hates because there is a lot of garbage and sewage. The ultimate destination of these rivers is our sea, and garbage also flows into the sea. Whales usually feed on big mouths and sea water, and garbage will also enter their bodies. After a long time, it became a stranded whale. Therefore, it is urgent to control marine pollution.