The Mermalair is the fifth main level and sixth level overall in the console versions of Battle for Bikini Bottom and all versions of Battle for Bikini Bottom - Rehydrated. This level does not require any Golden Spatulas to enter, but the player must have defeated Robo-Sandy first. The entrance is hidden within the Shady Shoals Rest Home.
Robots have taken over the Mermalair's security system. SpongeBob and Patrick need to work with the Mermalair Computer to shut down the security system and defeat the robots. They also need to help Mermaid Man and Barnacle Boy with other tasks.
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