One piece

Gathered in the tranquil sea forest, Luffy and his crew learn the history of fish-men and their struggle against oppression. Back then, the queen of Fish-man Island called for peaceful talks with surface-dwellers while others sought vengeance for years of slavery at the hands of cruel humans. But with every step of progress, an unforeseen tragedy deepened the cycle of hatred. Now, ignited by the flames of the past, the new Fish-man pirates continue their crusade and threaten anyone who dares to ally with humans. Swallowing a mouthful of steroid drugs, their bloodthirsty captain, Hordy, becomes an unstoppable force ready to decimate the royal guard. Determined to save the island and his crew, Luffy makes a decision that could turn a good friend into foe.