Plunder in the Sunken Ship

Plunder in the Sunken Ship is the first mission of Jolly Roger Bay in Super Mario 64 and its remake, Super Mario 64 DS. Its objective is to find a Power Star inside a sunken ship.

Layout
The titular sunken ship is located at the bottom of the bay, at the other end of where the player starts. It can be entered only through a small hatch, which is guarded by Unagi the eel. After the player dives down to the boat, Unagi must be lured out of the hatch before it can be entered. Once Unagi leaves, it starts circling above the ship but lets the player enter. In Super Mario 64, there are four treasure chests inside the ship that must be opened in the correct order. If this is done correctly, the ship rises to the surface, draining all of the water out. In Super Mario 64 DS, there is only a single treasure chest, but opening it has the same effect. Once all of the water is gone, the player can climb up a series of platforms to reach an ! Block. This block contains the mission's Power Star, and collecting it completes the mission.