References

    ↑ One Piece Manga and Anime - Chapter 444 and Episode 329, the Shark Submerge is introduced.

    ↑ One Piece Manga and Anime - Chapter 490 and Episode 385, Franky explains the Shark Submerge III's diving limit of 5,000 meters.

    ↑ One Piece Manga and Anime - Chapter 490 and Episode 385, the Shark Submerge III is seen being used to look for Fishman Island.