This episode marked a significant shift in the anime's art style and animation quality, adopting a more vibrant, "ink-brush" aesthetic suited for the Japanese-themed Wano arc.
For more details on the Wano Arc and upcoming episodes, you can check the One Piece Episode Guide on the One Piece Wiki. One Piece Episode 891
The crew encounters massive koi fish (carp) swimming in a strong current. Despite the danger, Luffy attempts to grab onto them, initially thinking about eating them. This episode marked a significant shift in the