One Piece Season 19 Episode 891 Climbing Up a Waterfall! A Great Journey Through the Land of Wano's Sea Zone!

After reading about the Reverie in the newspaper, Luffy's group finds themselves in the perilous sea surrounding the Land of Wano. The crew then encounters a school of giant koi fish. The clear water makes the crew wonder if they're in a river as the current leads them to the bottom of a waterfall. Luffy uses the giant koi fish to pull the crew and ship up the waterfall, they then sail into a whirlpool at the top, causing Luffy to be submerged.