Mermaid Man's belt is an item owned and worn by Mermaid Man. It first appears in the episode "Mermaid Man and Barnacle Boy IV" and later appears in the video games The Yellow Avenger and SpongeBob's Truth or Square.


From a distance, Mermaid Man's belt looks like an ordinary belt that is violet purple with the letter "M" that is light metallic blue, but up close, it appears to have a bunch of hardware inside of it.

In Mermaid Man's earlier appearances, it is yellow, similar to Aquaman's belt.


Role in episode

SpongeBob accidentally "steals" Mermaid Man's belt when he left it behind. SpongeBob decides to wear the belt and discovers the shrink ray button. He makes his own little bug tea party while still working by shrinking the Krusty Krab tables and food and feeding it to the bug.

Squidward finds him after getting disrupted by his work, and hence, threatens to call Mermaid Man and Barnacle Boy after he discovers that SpongeBob has the belt. SpongeBob gets upset over this and gets so out of control with crying that he accidentally zaps Squidward with the shrink ray. Worried that Mermaid Man will find out that he has his belt, he tries to find a "wise" friend and quickly resorts to Patrick.

After Patrick suggests to flip the M upside down, SpongeBob accidentally zaps Patrick with the shrink ray too, and then Sandy, then Larry, followed by everyone in Bikini Bottom. Everyone, except for Mermaid Man, Barnacle Boy, and Patrick, is mad at SpongeBob and start to attack his organs inside his holes. Then suddenly, SpongeBob for once comes up with a bright idea: to shrink Bikini Bottom, and so he does, making himself and everyone happy.

At the end of the episode, the bus arrives in large size and drops off Plankton, and humorously, he is confused with why the town is now just the right size for him, being small.

Role in video games

SpongeBob's Truth or Square

It is one of SpongeBob's memories.


  • According to SpongeBob, Mermaid Man has worn the belt for 65 years.
Mermaid Man and Barnacle Boy (VE)
SpongeBob's Truth or Square (VE)

Characters and actors: Andy SambergCaptainRicky GervaisPatchy's momDevil PottyAngel PottyCeeLo GreenRosario DawsonEddie DeezenTriumph, the Insult Comic DogDr. KrabsLeBron JamesTina FeyWill FerrellCamerafishBoom microphone operatorCraig FergusonRobin WilliamsThe 3 Point FowlThe Guy on the PennyThe QueenP!nkSir QuentinMr. TinderCameramanDirectorMimeOld sailorGoldfishWhaleTalking flowersNot SpongeBobWedding officiantLive-action whaleBlackbeardTenderizerPlanktoBotDemento BotSquidBotWee Yellow BotNosferatuSanta Claus

Locations: Krusty KrabKrusty Krab freezerChum BucketSpongeBob's housePatrick's houseSquidward's houseNickelodeon Animation StudioBurbankEncino

Songs: A Day Like ThisKrabby Patty JingleRubber Hose RagWe've Got ScurvyOh, Krusty KrabBeautiful DreamerRejected theme songs

Objects: Regular tikiHover tikiExplosive tikiWater tikiHint tikiStone tikiJellyfish netBubblesBaby jellyfishSandy's iced tea glassMagic Conch shellHeart-shaped acornMopHot dogGolden spatulaSnellie's pet carrierSoda drinking hatWooden clarinetSquidward's paintsBellybutton lint earmuffsMermaid Man's beltAquaphoneMermaid Man & Barnacle Boy's ring boxKrabby PattyOpen 24 Hours signMr. Krabs' first dollarPatrick's alarm clockKarate gearVolcano SaucePicnic basketMr. Krabs' first dimeKrusty Towers BellFriendship ringRecipe for a Krabby PattyWalkie-talkieSquidward tikiHappiness objectSockAir pump

Shorts: BalloonsJuice ManTrafficThe Outfit

Miscellaneous: DVDVideo gameOnline gamePC gameThe Great Escape bookGood Times!Screen NoveltiesBurger King toysThe Next 100 EpisodesThe Best 200 Episodes EverThe Pilot a Mini-Movie and the Square ShortsThe Complete Sixth SeasonSeason 6 Volume 1Triple Pack 1Big Hits: Volume 1The Super Spongy Square GamesAltronList of MTV bumpersSpongeBob's Greatest Hits

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