The famous ambergris is produced from its body.

Sperm whale (scientific name: Physeter macrocephalus): the head is large, the jaw is small, and only the lower jaw has teeth. It mainly eats squid. With a body length of up to 18 meters and a weight of more than 50 tons, it is the largest toothed whale with a head accounting for 1 / 3 of the body and no dorsal fin. It is a mammal with the deepest and longest diving ability. The body is short, slow and clumsy, and easy to hunt. The body length is 1825 meters and the weight is 20,25 tons. Its body color is grayish yellow, the head is particularly large, wedge-shaped, occupies the length of 1 stroke 3, the body is thick and short, slow and clumsy, and easy to hunt. The standing stock has dropped from 850000 to 430000.

Sperm whales are sometimes "pregnant" with freaks, usually gray or blackish waxes. they smell very bad when they are first taken out of the body, and are amber when dry, with a sweet and sour taste. This is the famous dragon saliva incense. Ambergris itself does not have much fragrance, but when it burns, it is full of fragrance, similar to musk, and farther away than musk. The fragrance of what it has smoked lasts for a long time, from which the name of sperm whale comes from. Ambergris ambergris is a valuable traditional Chinese medicine, which is used in the treatment of cough, asthma, heartache and other diseases.

There is a story about sperm whales: during World War II, when an American warship was sailing at night, its hull shook violently, and many officers and soldiers thought they had hit a reef or a mine, so they acted one after another, ready to dive for their lives. After inspection, it was found that the warship had hit a sleeping sperm whale.

So do sperm whales really sleep? How do they sleep? This problem has plagued biologists for many years, and their appearance of "sleeping together" was not recorded until 2008, and this picture shocked everyone. Franco, a professional underwater photographer, photographed the sperm whales sleeping. They suddenly stopped swimming synchronously and rested vertically.

This rare image was only recorded in 2008, and scientists point out that sperm whales sleep only about 7% of their lifetime, and each sleep is very short, only 6-24 minutes. In this moment, it is as if everything in the world has stopped for this, making people feel the mystery of life.

Scientists and diving photographers also used this short gap to observe the sleep of sperm whales. When they uploaded the sleeping positions of these incredible creatures, they got a lot of response from the public.

The picture of sperm whales sleeping vertically together is shocking, and the creatures of nature do contain many mysteries that we don't know.

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