Anime and Manga Differences

Originally in the manga, the Shark Submerge III was first shown to the Straw Hats when Franky explained about the Soldier Dock System in Thriller Bark. While shown, however, it was not until the crew reached the second half of the Red Line that the submarine was seen being used to look for Fishman Island.[3] In the anime, the Shark Submerge III was first shown being used during the Ice Hunter Arc.