Encyclopedia SpongeBobia


Encyclopedia SpongeBobia
Encyclopedia SpongeBobia
If you were looking for the article about the place, then see Chum Caverns (location).

"Chum Caverns" is a SpongeBob SquarePants episode from season 6. In this episode, Plankton falls into an underground cave and uses its scenery to attract customers.



The episode starts with Mr. Krabs kicking out two customers, saying they should listen to the sign about the mandatory side of fries policy. Another customer comes in and says he is not hungry, but Mr. Krabs handcuffs the fish to the ordering boat. Mr. Krabs then goes into the kitchen, where SpongeBob is flipping Krabby Patties as usual, and gives SpongeBob two spatulas so he can do twice the work. Mr. Krabs walks away going back to his office. In his office, Mr. Krabs trips on a loose floorboard. He uncovers it to reveal the Krabby Patty secret formula. Mr. Krabs takes a hammer and nails the floorboard back down.

Chum Caverns 069

Cave Dwellers.

The camera zooms out to show that Plankton is watching from his enormous telescope that goes out the Chum Bucket and into the Krusty Krab through the chimney. Plankton discovers that Mr. Krabs hides the Krabby Patty secret formula under the Krusty Krab floor boards after Mr. Krabs trips over a loose nail, and goes to get it by caving in underground. However, he crashes into a big rock, and when he digs deeper to go around it, he gets trapped in an underground cave. Plankton discovers it is beautiful and Karen comes up with a plan on how he could get more customers: he could lure them underground by the gorgeous scenery of the cave. In obvious fashion of Plankton, he ignores Karen before stealing her idea, to her annoyance. At that moment, Cave Dwellers appear, but Plankton tames them with his whip, making them his new employees.

Chum Caverns 108

Patrick eating chum nuggets.

Later that day, Mr. Krabs discovers that Plankton has more customers by his cave and decides to go down there to sell Krabby Patties. Plankton is mad about this and decides to get his revenge by trapping Mr. Krabs underground. The two end up fighting, trying to get each other trapped underground. They end up both getting stuck underground, where they lament their pointless feud has trapped them. The pair decide to work together if they ever get out, and soon SpongeBob comes to save them.

When he does, Plankton goes back on his word to travel above ground again to steal the secret formula, but when he gets above ground, his act has caused a chain reaction that causes him to fall back down and so does the Krusty Krab and the Bikini Bottomites in the caverns to get trapped. Mr. Krabs berates Plankton for his foolish acts and complains they are all stuck together in one place. However, one customer approves that at least they are in the Krusty Krab restaurant together. Mr. Krabs accepts it, but notes without Squidward, he needs somebody to take his place and looks up to Plankton. The episode ends by showing the cave dwellers forcing Plankton as cashiers while using whips to ensure he does the job better than Squidward.


This episode was confirmed and added to the US Copyright Office on March 30, 2009.[1]



 ) Production music
 ) Original music
 ) SpongeBob music

  Hawaiian Misadventures B - Nicolas Carr, Sage Guyton, Jeremy Wakefield [Title card]
  Jovial Pirate's Jig - Michael Bolger, Nicolas Carr ["Looky, another bright-eyed, bushy-tailed customer!"]
  New Vibe Hits - Nicolas Carr [Secret formula hidden under Krabs' floor]
  Zelle 501 - Gerhard Trede [Plankton spying Krabs]
  Zelle 503 - Gerhard Trede [Plankton drilling underground]
  Big Bad Giant - Paddy Kingsland [Drill hits a rock]
  Munitions Train [#19] - Harry Bluestone, Emil Cadkin [Plankton tunneling under the rock]
  Prologue of a Drama #9 - Delle Haensch, Hans Conzelmann [They fall into an underground cave]
  Steel Licks 47 - Jeremy Wakefield [They fall into an underground cave]
  Voyage of a Lifetime 1 - John Fox [Pan of cave]
  Noodly Shinanigans - Nicolas Carr, Barry Anthony [Karen gets an idea]
  Hgliss & Bell - Nicolas Carr ["Karen!"]
  Noodly Shinanigans - Nicolas Carr, Barry Anthony [Plankton thinks Karen's idea]
  Horror House Of Wax Retro 2 - Nicolas Carr, Ron Wasserman [Cave dwellers]
  Cellar Search - Philippe Pares ["From now on, you shall be my minions."]
  Tiki Rapido - Lionel Wendling [Cave turned into a restaurant]
  Kommissar X - Gerhard Trede [Cash register full of money]
  Steel Licks 37 - Jeremy Wakefield ["I'm running out of space for this stuff."]
  Tentacally Speaking - Sage Guyton, Jeremy Wakefield [Patrick eating chum]
  Symphonic Panorama - Gregor F. Narholz ["You come down here to admire the subterranean splendor of the chum caverns."]
  Tiki Rapido - Lionel Wendling [Gift shop]
  Steel Licks 40 - Jeremy Wakefield [SpongeBob goes back to the Krusty Krab]
  In a Minor Mood Jig - Michael Bolger, Nicolas Carr ["Where have you been?"]
  Battle March Link (F) - Keith Mansfield ["Krabs? What are you doing here?"]
  Salty Krab Jig - Michael Bolger, Nicolas Carr [SpongeBob selling Krabby Patties]
  Enter the Villain - Christopher Payne, Paul Rogers ["Krabs, you can't just slither down here and steal all my customers!"]
  New Vibe Hits - Nicolas Carr ["Sea turtles, he called it!"]
  Slide Whistle Stooges Theme - Nicolas Carr, Sage Guyton, Jeremy Wakefield [Plankton and Krabs tunneling under each other]
  The Great White - Gregor F. Narholz [Plankton and Krabs trapped underground]
  The Nasty Kit 1.7 - Irving Washington [Strip Sounds] [Krabs yells that there's no way out]
  The Pollywog Strut - Nicolas Carr, Barry Anthony [Plankton tries to escape]
  Epic Tragedy - Gerhard Trede [Plankton and Mr. Krabs crying/Plankton and Mr. Krabs still crying 15 minutes later]
  Minor Chord Ending - Nicolas Carr
  Tearjerker [#79] - Harry Bluestone, Emil Cadkin ["Let's agree to work together."]
  Bridge H - Gregor Narholz ["Hang on a minute."]
  Film Fanfare (a) - Dick Stephen Walter [SpongeBob rescues them]
  New Vibe Hits - Nicolas Carr ["Where'd he go?"]
  Grass Skirt Chase - Sage Guyton, Jeremy Wakefield [Plankton trying to steal the formula]
  Sword Fight - Harry Bluestone, Emil Cadkin [Everyone gets trapped underground]
  Pirate's Opus - Michael Bolger, Nicolas Carr ["Satisfied with yourself, Plankton?"]
  Nude Sting - Nicolas Carr [Ending]



  • "Chum Caverns" was ranked #62 during the SpongeBob's Top 100 event in the UK and Ireland from June 4-8, 2012.



  • Two clips from this episode were on the "Deep Sea Danger Zone" commercial, but it did not premiere during that week. It was planned to air as the fourth premiere, but it was changed to "Squid's Visit."
  • This is the first episode where Bikini Bottom goes underground.
  • There are two online games based on this episode, titled Gas Blast and Bubble Blast, respectively.
  • In this episode, the secret formula is seen hidden under a wooden plank floor in Mr. Krabs' office, but in the episode "Plankton's Army," Squidward says "Let me guess, it's at home, under your mattress," and Mr. Krabs rushes to his house. However, in most other episodes, it is seen in Mr. Krabs' safe.
  • This is the second episode where people eat chum, thanks to the attraction. The first was "Chum Bucket Supreme."
  • This is one of the few episodes where SpongeBob enjoys eating chum, as in the episode "Chum Bucket Supreme," he hates the taste of it.
  • As of this episode, every main character has worn a Krusty Krab employee hat.
  • This episode marks the first mentioning of sea turtles in the series. They would later be shown in "Shell Games" from season 12 and the online game Kash Krab.
  • This is the only episode in which the French Narrator cries.
  • In the Russian dub, the "secret formula" was translated as "лекарство," which means "medicine" in English.

Cultural references[]

  • One scene of Mr. Krabs and Plankton digging underground references the Namco arcade game Dig Dug.
  • The cave dwellers in this episode are similar to the Morlocks from the 1960 film, The Time Machine.


Chum Caverns 001

The path to the Chum Bucket is missing.

  • When the episode starts, the path to the Chum Bucket is missing.
  • While Plankton is shown spying on Mr. Krabs at the beginning of the episode, his eye shown through the telescope has his cornea blinking rather than his entire eye including the sclera. His eyebrow is also on top of his cornea rather than his entire eye.
  • While Plankton uses his drill, the outside is bright orange, but switches to a light reddish-orange on the inside.
  • In the Chum Caverns, there is no elevator shown going back up.
  • When Plankton and Karen first discover the caverns, how they get back up to the surface in later scenes to install the restaurant and elevator is unexplained.
  • The first time the elevator is shown going down, eight people enter it from ground level. The second time, only six people enter at ground level.
  • Plankton is on the surface at the end, but when the Krusty Krab falls underground, he is inside it.
  • When Plankton first begins to dig, the drilling tool is on a wire. In the next scene, it is attached to the vehicle. His vehicle is destroyed when he reaches the Caverns. Then, later in the episode, it reappears when Plankton digs under Mr. Krabs.