What species are the green snake and the white snake in the legend of white snake?

At the end of the Ming Dynasty, it was recorded in the book "Children's Eyes in Shi Jing" that white and green quilts were covered to reveal their original shapes, and they were white snakes and herrings that had become roads for thousands of years.

There are also eight poems that play a warning role. This poem writes:

My ancestors gave me the world of mortals, and Cycas bloomed without spring.

The cycle of transformation is very heavy, and life is reborn.

If you want to know that color is colorless, you must know that it is invisible, but it is tangible.

Empty color is color, and empty color should be clear.

This is a beautiful albino literary snake. It has a strong background. I guess adults don't want children to disturb them while playing cards. They were fooled by Goddess Guanyin and took pet fish to the mortal world. They opened a small shop and raised a small white face. Unexpectedly, they scared their little white face to death, afraid of being accused backstage. Moreover, before they had had enough fun, they went to Yaochi and Empress Hu Yi in the sky. Then the queen mother listened to Guanyin and gave it to her after the backstage approval. I'm helpless, too. I can't make up excuses. Just make an excuse. "Mrs White Snake was captured alive with a magic weapon. You see, this background is full of cows that dare not hurt and kill, and then they are delicious and delicious like immortals for more than 20 years. During this period, Xiaobai was still dissatisfied with the arrangement of running out of Leifeng Tower once. You see, it's not because it can't run out, but because it dare not come out. Fahai put a spell on it so that people all over the world could hear it. He, Bai Niangzi and Bai Niangzi's pet fish (Xiaoqing) are going back to heaven, but when they go back, they are dragging a drag bottle of Bai Niangzi's small white face (exactly). Who is the backstage boss? How many people do you think can command Guanyin Bodhisattva to run around (not only in Middle-earth Buddhism, but also in primitive Buddhism)? How many people can arrange a powerful old monk at once?