SpongeBob's skeleton is the skeleton of SpongeBob. It first appears in the episode "Mermaid Man and Barnacle Boy III."


Due to inconsistencies in the design, the skeleton looks differently every time it appears. However, most of the time it is a white and gray skeleton with SpongeBob's similar eyes and teeth. The skull is always seen as rectangular, which supports SpongeBob's skin to become solid.

Role in series

"Mermaid Man and Barnacle Boy III"

Whem Man Ray is free from the tickle belt, he uses some of Mermaid Man and Barnacle Boy's gadgets to zap SpongeBob and Patrick and their skeletons appear.

"Squid on Strike"

SpongeBob says to Squidward that they will both work at the Krusty Krab forever. Squidward imagines what this would look like. SpongeBob and Squidward are then shown in skeleton form with SpongeBob's skeleton behind the cash register.

"Roller Cowards"

SpongeBob and Patrick go on the roller coaster The Fiery Fist O' Pain. As they ride it, they go down a drop, which is 90 degrees, causing both SpongeBob and Patrick's skeletons to fly off the coaster.

"Atlantis SquarePantis"

After Patrick pops oldest living bubble, him and Patrick scream and their skin piles down, revealing their skeletons.

"The Splinter"

While SpongeBob was trying to remove the splinter, he decided to remove it with his teeth, but the splinter was way stronger than SpongeBob, and his skin rips off, revealing his skeleton.

"The Legend of Boo-Kini Bottom"

When SpongeBob finally gets scared by the Flying Dutchman, he splits up into his skin and his skeleton. The two run away together from the Flying Dutchman's ship until they make it back to Bikini Bottom, where they merge back into normal SpongeBob again.

"Chatterbox Gary"

SpongeBob opens his face for his everyday items. By doing so, he reveals his skeleton.

Role in other media

Comic Books


SpongeBob's skeleton running away

The skeleton appears in the book Bare Bones as part of the main story where, after successfully scaring SpongeBob, Patrick and the sponge chases the runaway skeleton that jumped out of SpongeBob.

Video games

The skeleton appears as merely cameos in the video games, most of the time as for comedic purposes. In the console versions of SpongeBob's Truth or Square, the skeleton appears as the final idle animation that plays if the player idles for too long, which has SpongeBob aging quickly to his death. The bones will fall apart and quickly turns into the regular SpongeBob if the player makes the sponge move.

In the console versions of Creature from the Krusty Krab, entering the code "KRABBY" in the cheats section will unlock the skeleton skin for SpongeBob in the Alaskan Belly Trouble chapter. The skeleton also appears in one of the microgames in SpongeBob SquigglePants, as well as in SuperSponge.

In Nicktoons: Android Invasion when SpongeBob getting electric by lasers his skeleton can be seen.



SpongeBob's interior without the skeleton in Slimy Dancing.

  • The existence of the skeleton inside of SpongeBob, like the appearance, has been inconsistent throughout the series. Some episodes or media depicts SpongeBob not having any skeleton from the inside aside from organs.
    • In various episodes, SpongeBob's interior is depicted to be completed empty, aside from the mouth, eyes, and pores, the biggest example of this being "Slimy Dancing."
  • In most appearances, the skeleton is depicted to have its own sentience separate to SpongeBob. Although, most of the time, it is for comedic purposes only.
  • Biologically, SpongeBob should not even have a skeleton since sponges are invertebrates.
Mermaid Man and Barnacle Boy (VE)
Atlantis SquarePantis (VE)

Characters:Lord Royal HighnessAtlantean citizensCaptain of the Sea Ship AtlantisKnowledge MachineAtlantean RobotsRobot touristsRed AtlanteanYellow AtlanteanAtlantean royal guardNandoSpongeBob hallucinationAggressive Case of the SnifflesOrange guardBubble SpongeBobVultureDave (cave)Ghostly piratesGermsNorblock FivePedal-throwing robotMagenta thugPale anakiwa thugLight brown thugGreen jellyfishRed jellyfishGhost jellyfishBlack jellyfishMagma jellyfishDiamond JellyfishSteel JellyfishBrown tall fishPurple tug fishPontifexGigantic JellyfishRoyal Guard CommanderLawrence WhelkJohnny

Locations:AtlantisMuseum of AtlantisMuDriving You Nuts!SpongeBob's pineapple gardenSquirrel Museum of NutsSquirrel CityWhelk-MartJellyfish FieldsEncinoGasMusic StationNickelodeon Animation StudioBikini Bottom MuseumAtlantis PalacePlankton's DenAtlantis ParkAtlantis CliffsAtlantis SuburbsBikini BottomKelp ForestShip GraveyardThe Escape RouteThe Bubble RoomThe Art RoomThe Science RoomThe Armoury Room

Objects:Plankton's tankAtlantean amuletSea Ship AtlantisOldest living bubbleGolden spatulaSheet musicMelody ShellsToolkitSpeed BoostersHooksAtlantis bubblesBubble Collector 2000Frampton Comes AliveSquidward tikiCanned BreadAnchor ArmsTackTime ClockNut LauncherPaper clipConveyor beltsPlankton's shoesTreadmillYellow AnchorCombJellyfish netSquidward's clarinetSpongeBob StatuePatrick StatueSquidward Statue

Songs: The Bubble SongFueling the BusMr. Krabs' songSandy's songSquidward's songPlankton's SongGood-Bye, AtlantisBack in Encino

Shorts: Are We There Yet?Beware Flying JellyfishDocumenting Our Road Trip

Miscellaneous: DVDBookVideo gameMobile gameOnline gameAtlantis unofficial songSpongeBob's Director's CommentaryMy Trip to Atlantis - by SpongeBob SquarePantsSpongeBob's Atlantis SquarePantis SquareOffInside the SpongeBob Animation StudiosBehind the PantisOn the Road AgainFrom the Beginning, Pt.2The Best 200 Episodes EverSpongeBob SquarePants Vol. 7SpongeBob SquarePants Special Collection, Vol. 1The First 100 EpisodesThe Complete Fifth SeasonSeason 5 Volume 2Blitz GamesAltronSpongeBob Z-A CountdownPaparazzi ParadeSwapBob SpareFaceSea-BayHappiness to Go!Best Bikini Bottom Stories Ever!The SpongeBob Super Square Collection

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 toysBikini Bottom Bash DVDThe Next 100 EpisodesThe Best 200 Episodes EverThe Pilot a Mini-Movie and the Square ShortsSpongeBob SquarePants Vol. 9The Complete Sixth SeasonSeason 6 Volume 1Triple Pack 1Big Hits: Volume 1The Super Spongy Square GamesAltronList of MTV bumpersSpongeBob's Greatest Hits

SpongeBob's Big Birthday Blowout (VE)

Characters and actors: JimBobPatrick (live-action)Mr. ManwardMr. SlabsPearl SlabsMr. CharlestonCarolJack GriffoDaniella PerkinsKel MitchellBeanie McBeanJace NormanDavid HasselhoffCory DemeyersLana McKissackSydney OlsonCanGorilla BossMonkey Middle ManagersGilbert GottfriedSlappyPA SystemOffice Middle ManagementPatrick's lover fishDog walkerRubePie dragonJoJo Siwa

Locations: Trusty SlabCrumb BasketBeach Blanket Bean-GoLand Aquarium

Songs: Slabby Patty SongSpongeBob SquarePants Theme Song

Objects: Slabby Patty

Shorts: 1 Second From Every SpongeBob Episode!

Miscellaneous: Double Dare SpongeBob WeekBest Yellow Summer Ever marathonsBikini Bottom Bash DVDSpongeBob SquarePants Vol. 20

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