In order to save Zhao Lan, Tang Zhou and his companions sneaked into the East Sea. They find out that the Aqua Clan is being oppressed by the Dragon Clan of the East Sea. Together, all three of them help a lot of the weaker Aqua Clans. While doing that, the elder of the Aqua Clan recognizes his power as the Nine Fins. The Nine Fins Clan used to be the ruler of the Four Seas. So, the other Aqua Clans start to seek refuge with Yu Mo as well. (Source: Viu)