Shi Zhu cooperated with Shi Feiyang to hang all three segments of the sea eel using the Six Roots Pure Bamboo, using the Nine Heavens Gang Wind to dry them into "dried worms," sealing them within the Spirit Bamboo.
Once this largest demon beast was dealt with, the remaining ones were easy to handle, no longer needing Shi Feiyang to take action, as the sword immortals from various paths either slew or expelled them.
Soon, the East Sea was calm, with the clouds clearing to reveal blue skies and white clouds.
This invasion by the demon beasts was merely a probe by Chi You, and there are likely more formidable beasts to follow.
However, Shi Feiyang would stay in the Capital for now, not going anywhere until the young emperor finished refining the Mo Long Sword.
