The Mermalair (also known as Sea Cave[1]) is the secret hideout of Mermaid Man and Barnacle Boy. It first appears in the episode "Mermaid Man and Barnacle Boy II." The Mermalair holds a variety of weapons used by Mermaid Man and Barnacle Boy, including the Orb of Confusion.



Secret entrance

To enter the Mermalair, a secret switch must be pressed inside Shady Shoals rest home, and it will activate a secret door under the couch (much like the entrance to the secret lair of Darkwing Duck which involves a secret door under
Mermaid Man and Barnacle Boy II 027

Secret entrance

two recliners). A hole leads down to the lobby of the Mermalair.[2] SpongeBob SquarePants comics, it's accessible by charging full speed at a wall in the home.

There is another entrance, which is a cave like the batcave from the Batman series (most likely for their boat, Invisible Boatmobile, to get outside). Shady Shoals is located nearby a large cliff which marks the possible location of the cave.

The Mermalair is broken up into the following sections:

  • Mermalair Lobby - Entrance Area[2]
  • Mermalair Main Chamber - Security Computer, Funnel Machines, Tower of Power, and a leisure area for Mermaid Man and Barnacle Boy.[2]
  • Mermalair Security Tunnel - Tunnel leading to the Rolling Ball Room[2]
  • Rolling Ball Room[2]
  • Villain Containment Area - Where villains are locked up.[2]
  • Exit- Contains a door and the Invisible Boatmobile. The door first appeared in "Mermaid Man and Barnacle Boy III."

Cave entrance

The cave entrance of the Mermalair contains the Wall of Superhero Super Gadgetry.[3] This wall contains such gadgets as the Cosmic Ray, the AquaGlove, and the Death Grenade.

An additional tool is the Orb of ConfusionProlonged exposure to the Orb of Confusion will give its victim confusion. Another tool is the Tickle Belt (as seen in Mermaid Man and Barnacle Boy episode 17).[3]

Another room in this area of the Mermalair is where Man Ray was frozen in tartar sauce.[3]
Mermaid Man and Barnacle Boy III 030

Additional features include:

  • Tubes where the I.J.L.S.A member's costumes are contained in.[4]
  • A conference room with the I.J.L.S.A. Table[4]
  • Prawn's cell[2]
  • The Main computer (contains a fish inside).

Mermalair lobby

At the end of the hole at the entrance, the lobby of the Mermalair is the first room. It contains various obstacles to get to the main chamber.[2]

Mermalair main chamber

The Mermalair Main Chamber is found after the lobby. Inside, the Security Computer is present, in which it controls the security system. In addition, funnel machines and the Tower of Power control the power within the Mermalair. Finally, a leisure area, including a Television set, is where Mermaid Man and Barnacle Boy rest.[2]

Security system

The Mermalair has a large security system which Mermaid Man and Barnacle Boy use to keep the villains in the villain chamber locked up. In order to shut the whole system down, four buttons must be pressed, along with the main shut-down button, at the main computer.[2]

The Wall of Weapons

  • The Super Walkie Talkies
    031a - Mermaid Man and Barnacle Boy III (046)

    The Wall of Weapons.

  • The Killer Paddle Ball
  • The Fish-Bat
  • The Radio-Powered Satellite Shoe
  • The Infinity Anchor
  • The Mermerang
  • The Power Goggles
  • The Cosmic Ray
  • Death Ray
  • The D.I.Y Hammer
  • The Aqua Glove


  • "The String"- The Mermalair was presumably destroyed when SpongeBob unraveled all of Bikini Bottom and the Milky Way with the string.


  1. ^ "as heard in "Mermaid Man and Barnacle Boy"
  2. ^ a b c d e f g h i j as seen in the ESB: Battle for Bikini Bottom video game.
  3. ^ a b c as seen in the episode "Mermaid Man and Barnacle Boy III"
  4. ^ a b as seen in the episode "Mermaid Man and Barnacle Boy V"
Locations (VE)


Bikini BottomRock BottomNew Kelp CityAtlantis

Bikini Bottom Areas

Goo LagoonJellyfish FieldsKelp ForestDead Eye Gulch

Bikini Bottom Residence

120 Conch Street122 Conch Street124 Conch StreetSandy's treedome3451 Anchor WayMrs. Puff's houseBetsy Krabs' houseGrandma SquarePants' house

Bikini Bottom Establishments

Barg'N-MartChum BucketKrusty KrabMermalairMrs. Puff's Boating SchoolBikini Bottom MallGoofy Goober's Ice Cream Party BoatHatsReef CinemaBikini Bottom JailBikini Bottom High SchoolBikini Bottom HospitalGymThe Salty SpitoonAdult Learning CenterBottom of the Hill CommunityBikini Bottom ZooFancy!Glove World!Weenie Hut JuniorsSuper Weenie Hut JuniorsWeenie Hut GeneralShady Shoals Rest HomeOld Man Jenkins' barnOld Man Jenkins' houseBikini Bottom AirportDinerBunny BunsKing Neptune's castle

Mermaid Man and Barnacle Boy (VE)
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