The Devourer

Tritannus takes control of a dangerous fish called the Devourer and orders it to devour all of the Selkies in the Infinite Ocean. Flora, Tecna, and Musa must then try to find its weakness point. On the world Domino, a royal council meeting is held on what action must be taken about Tritannus. But it seems that all of the kingdoms have different ideas and different points of views.