After it came to China, it was renamed Aoyu, and the so-called leading fish was called Aoyu.
There are related records in Ji Xiaolan's Notes on Yuewei Caotang in Qing Dynasty.
The book says that Ji Xiaolan's friends once told him that he had seen Yi Long. "See Elon from west to east, the head angle is slightly the same as drawing, but the four feet are open, shaking like a boat drum, the tail plaque is wide, and the fiber grows at the end. Between the snake and the fish, the belly is as white as a horse. " The dragon seen here is described as "the tail is flat and wide, like a snake like a fish". According to this description, it is quite similar to the Capricorn fish in ancient legends. Capricorn fish originated in India and is a creature with a faucet, a trunk and a fish body. It is regarded by Indians as the essence of rivers and has the power to turn rivers into the sea. After it came to China, its fierceness gradually weakened, and it gradually merged with the image of the local octopus in China, and its trunk gradually degenerated. The octopus looks like a dragon and a fish.
People build images of octopus on the roof to prevent fire.
Because it is easy to swallow fire, people build octopus images on the roof to prevent fire. But in the Ming and Qing dynasties, Capricorn fish was not mentioned much. There was a kind of "Ying Long" in Ming Dynasty, which was quite similar to Capricorn fish in image. In the Ming Dynasty, Ying Long had a dragon head with wings, fishtail and forelimbs as strong as a dragon, but it was actually a variant of the image of Capricorn. At that time, ancient books and documents called it flying fish, but there was no Capricorn. According to historical records, when the traitor Yan Song was robbed of his property, he had a jade belt called Flying Fish White Jade Belt. In Ming history, it was called "flying fish", not Capricorn. As for what this has to do with Capricorn in the twelve western constellations, I don't understand Yi Shu, haha.