As you were swimming by yourself, you saw an under water palace. The two gates made of red coral and golden purple crystal, suddenly the door opens. The palace is full of blue and purple flowers. From the center of the palace there is a purple crystal coffin

Xiaoyin was lying there. His upper body is no different from a human, but his lower body, silver fish tail. He suddenly opened his eyes, pulled you into the crystal coffin and his hand touched your legs “Where's your tail?”