The Secret Aquarium is a secret course that appears in Super Mario 64 that consists of the inside of an aquarium, with Red Coins scattered about. It is accessed through a hole in the wall, in the room that houses the entrance to Jolly Roger Bay. Also, Mario cannot surface to breathe in this level; the coins must simply be collected quickly enough. Upon collecting every Red Coin, the Power Star will appear in the center of the aquarium near the floor.

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