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The third grade popular science composition is 400 words.
During our autumn outing last semester, we visited Qingdao Aquarium and saw all kinds of fish and some specimens of marine life. Among them, I was very interested in a marine mammal-sperm whale, so I went home to check the information and got a deeper understanding of sperm whale.

Adult sperm whales 12- 18m can weigh up to 57 tons. The head is big, box-shaped, dark gray-brown to brown, with 18-25 functional teeth, and has the ability to dive into the deep water below 1000 meters without floating for one hour.

I looked up another magical thing about sperm whales-Long Xianxiang. Long Xianxiang is a precious spice and has the reputation of "king of spices". The fragrance of Long Xianxiang is elegant and has a special sweetness. It can keep the fragrance for hundreds of years. How did Long Xianxiang come into being? It turns out that sperm whales like to eat octopus and squid, and the food is "angular" and cannot be digested. When it is excreted, it will cut the intestine. After a long evolution, sperm whales can excrete some substances from the gallbladder, wrap them in "horns" to form a substance and excrete it. However, this substance is not fragrant, but an extremely unpleasant smell. If this substance is to become Long Xianxiang, it must be soaked in seawater for a long time, blown by sea breeze and exposed to the sun before it can become a real fragrant Long Xianxiang.

Isn't Long Xianxiang great? But this is only part of the sperm whale. Sperm whales still have many magical places that have not been discovered!

Sperm whales are amazing!