Some people think this may be related to its preference to prey on giant squid. In order to obtain this delicacy, sperm whales often have to dive into the deep sea, and over time they have adapted to the deep sea environment.
During World War II, an American warship was traveling at night when its hull suddenly shook violently. After inspection, it was discovered that the warship had hit a sleeping sperm whale.
The ancient Chinese book "Guang Yi Ji" records: "At the end of the Kaiyuan Dynasty, there was a Thunder God fighting with a whale in Leizhou. He came out of the water and dozens of Thunder Gods were flying up and down in the air, either setting fires or giving electric shocks. They would stop after seven days. The residents at the seaside looked over and saw that the water was red. It is estimated that what is described here is a fierce battle between a sperm whale and a giant squid, but the text is obviously too exaggerated.
It is reported that there are also 30 to 40 meter long squid in the depths of the ocean. It would not be easy for a sperm whale to swallow such a huge behemoth. It would require a hard fight, but within an hour or two at most, the squid would be buried in the belly of the sperm whale.
Sperm whale