"Planet of the Jellyfish" is a SpongeBob SquarePants episode from season eight. In this episode, SpongeBob and Sandy battle an evil jellyfish who have cloned other Bikini Bottomites.



The episode starts out with SpongeBob and Patrick catching jellyfish at Jellyfish Fields when the latter says that if they would not sting, they would be perfect pets. Shortly after, a large alien jellyfish-like monster with large black eyes consumes a jellyfish, and then out of one of the tentacles spits a small pile of pink goo, which morphs into a jellien, a jellyfish with large black eyes. Said jellien is commanded to engulf someone as the Jellien King spits out more jelliens. Patrick goes to take a nap, with the jellien following him. As the former naps, the latter stretches out its body so that Patrick is inside of it, then one of its tentacles spits out a tall pile of pink goo, with morphs into Jellien Patrick, whom is Patrick but with large black eyes, same as the jelliens. Patrick uses his blue mouth tentacles to pick up his net as SpongeBob catches the jellyfish. Jellies swarm into Jellien Patrick's net, and then Jellien Patrick gets an idea to turn everyone in town into jellien people by giving them jelliens.


The jellien is about to consume SpongeBob.

Later at night, SpongeBob and Jellien Patrick arrive at Squidward's house. Jellien Patrick stuffs his last jellien into the latter's mail slot, then the jellien's tentacle spits out a tall light blue pile of goo from the window, which morphs into Jellien Squidward. This jellien and Jellien Patrick wish SpongeBob a good night. The latter sleeps cozily in his bed as the Jellien that originally captured Patrick attempts to capture him, but SpongeBob awakes with insomnia. As he watches a late movie, the jellien tries to capture him again, but SpongeBob throws popcorn into the jellien's mouth, and it starts choking on it, falling behind the couch.

The next morning, SpongeBob puts the Jellien into a cage as he leaves for work. It escapes, and consumes Gary as he sleeps, as well as the plant next to him. His tentacle spits out another small pile of goo, which reveals a Jellien Gary-plant hybrid. The scene switches to the Krusty Krab, which is completely filled with Jellien Bikini Bottomites, except for one man. Said Jellien Bikini Bottomites order Krabby Patties but "hold the mayonnaise" until the man who wasn't a jellien person orders a patty with extra mayonnaise. Jellien Mr. Krabs comes and says that they were "out of the condiment called mayo," and places a jellien on the guy's head. SpongeBob thinks that is weird, because the Krusty Krab had a fresh wall of mayo in the freezer. He then tells Jellien Patrick that he is getting mayo for the guy's patty. Patrick turns his head around, his torso still facing the grill, and yells "No mayonnaise!" Then his mouth tentacles consume the patty. SpongeBob goes to the freezer and grabs a box of mayo, then looks through the peephole. It shows everyone in town, minus Sandy, hibernating in transparent green cocoons hanging from the ceiling, as the Jellien King commanded his jelliens to do stuff for him. He saw it in a horror movie

SpongeBob realizes that something is very wrong. He is then ordered by Jellien Mr. Krabs to take a nap. SpongeBob flees from the Krusty Krab, with several Jellien Bikini Bottomites chasing him. Afterwards, he is captured and kidnapped by Sandy. The latter tickles him, and he giggles, showing he is not a jellien clone. They figure out that the jellien's weakness is mayonnaise since they ordered food with no mayo. They then exit with sunglasses with a lens that look like jellien eyes. Unfortunately, when joking in front of Jellien Mr. Krabs, SpongeBob elbows Sandy, knocking off her sunglasses, and Jellien Krabs shouts "imposters!," which knocks off SpongeBob's sunglasses as well. The latter quickly grabs a mayo sprayer and destroys the entire town of Jellien clones. When a clone is destroyed, the real person of the clone awakens, and the cocoon they were trapped in disintegrates.

After dealing with the Jellien Patrick, who was the last one, SpongeBob and Sandy find the hideout, containing every Bikini Bottomite cowering in fear. SpongeBob destroys one side of the Jellien King's jelliens, but the mayo starts to freeze. He tosses the mayonnaise from the jar, but it freezes as well and lands in between the Jellien King's eye stems. Sandy turns up the heat, and the mayo melts, destroying the Jellien King. The remaining several jelliens, not hit by mayo, then pop like bubbles. SpongeBob explains everything, which takes eleven minutes. Patrick tastes the jelly and compliments it as a relish. Soon, the goo remaining from the clones and jelliens is sold as Evil Clone Jelly Relish for $4 extra than regular Krabby Patties. Patrick then orders a Relish Patty and then says "Hold the mayo." SpongeBob hears this and looks suspiciously at Patrick, and then the words "The End?" appear on the screen, ending the episode.




 ) Associated production music
 ) Original music
 ) SpongeBob music
  Lost in the Galaxy [#36] - Harry Lubin [title card]

  Honolulu March - Hans Haider [opening at Jellyfish Fields]
  Wailing Theremin 2 - Harry Lubin ["Does Jellyfish Fields seem different today?"]
  Solo Steel and Vibes 1 - Jeremy Wakefield, Nicolas Carr ["All this failure sure is making me tired."]
  Desolate Lands - Harry Lubin [SpongeBob goes by the cave]
  Hostile Space - Harry Lubin [jellien leader sends minions out]
  Planet Xz-3 30 - Gregor F. Narholz [Patrick is cloned]
  Alien Abduction [#11] - Harry Bluestone, Emil Cadkin ["I too have caught many jellyfish."]
  Alien Abduction [#10] - Harry Bluestone, Emil Cadkin [Squidward is cloned.]
  Solo Steel 3 - Jeremy Wakefield [SpongeBob goes to bed]
  Desolate Lands - Harry Lubin ["I can't sleep."]
  Some Things To Know About Monsters - Eban Schletter [SpongeBob watching a horror movie]
  Solo Steel 1 - Jeremy Wakefield [the next morning]
  Lost in the Galaxy [#35] - Harry Lubin [Jellien clones Gary.]
  Out of the Crypt - Harry Lubin [Gary is cloned]
  Deep Shadows - Eban Schletter [line of jellien clones at Krusty Krab]
  Death of the Alien 1 [#38] - Harry Bluestone, Emil Cadkin [clones hiss at a customer]
  Dark and Scary - Harry Lubin [jellien Patrick cooking patties]
  Evil Alien Attack 1 [#14] - Harry Bluestone, Emil Cadkin [jellien leader in the freezer]
  Twilight Zone - Harry Bluestone, Emil Cadkin [jellien clones chase SpongeBob]
  Undercover - Harry Bluestone, Emil Cadkin [SpongeBob is dragged into Sandy's treedome]
  Hot Steel and Slide Licks (a) - Jeremy Wakefield [Sandy tickles SpongeBob]
  Lost in the Galaxy [#35] - Harry Lubin ["So you don't like mayo... just like a jellien!"]
  Shock Happening 1 - Harry Lubin ["We'll never get past... Them!"]
  Spongeburglar - Nicolas Carr [SpongeBob and Sandy in disguise]
  Desolate Lands - Harry Lubin ["Greetings, fellow clone."]
  Death of the Alien 1 [#39] - Harry Bluestone, Emil Cadkin ["Imposters!"]
  Evil Alien Attack 1 [#14] - Harry Bluestone, Emil Cadkin [jellien leader growls at everyone]
  Death and Destruction 1 - Harry Bluestone, Emil Cadkin [SpongeBob defeats the jellien leader]
  Harp Ding - Nicolas Carr [Krabs gets an idea]
  Pirate's Opus - Michael Bolger, Nicolas Carr [Krabs selling relish patties]
  Lost in the Galaxy [#35] - Harry Lubin [SpongeBob thinks for a second]
  Out of the Crypt - Harry Lubin [The End?]




Cultural references


  • When SpongeBob first walks into the Jellien-infested Krusty Krab and notices a line of customers, there are two jellien clones in front of the normal fish. After the first jellien clone finishes his order, the normal fish comes up next, actually skipping the second Jellien Clone.
  • When Jellien Squidward tries to give SpongeBob a Jellien, it also has eyelashes just like the one Jellien Mr. Krabs gives to the customer. However, after SpongeBob leaves and Jellien Squidward still has the Jellien, its eyelashes are gone.
  • The Jellien Clones put the mayonnaise SpongeBob used in the freezer despite it being their weakness.
  • When SpongeBob tells Jellien Patrick that he needs a Krusty Krab employee hat, the latter literally grows one on his head. When SpongeBob first mentions he is going to get mayonnaise, if one looks really carefully, Jellien Patrick's hat actually moves when he turns around, saying "No mayonnaise!" The hat should not move since if Jellien Patrick grew it on his head, the hat should be a part of his body.
  • When Jellien Squidward points out that the normal fish wants mayonnaise on his Krabby Patty, the patty is still on the tray. When SpongeBob takes the Krabby Patty from Jellien Squidward to go and puts mayonnaise on it, the patty is suddenly on a small plate.
  • When SpongeBob first walks out of the Krusty Krab and bumps into Jellien Harold, he has his Krusty Krab hat on. However, in the next shot, when SpongeBob runs from the group of Jellien Clones, his hat is missing. Finally, in the third shot, after SpongeBob comes from behind the rock, his hat is suddenly on again.
  • Throughout the episode, Jellien Patrick's belly button keeps disappearing.
  • Just before Gary is engulfed by a jellien, his shell inverts colors in between scenes.

Gary error

  • At the end of the episode, when SpongeBob walks out of the kitchen with a Krabby Patty, his pants are a different shade of brown than usual.
  • Gary is not seen in the freezer with the rest of the Bikini Bottomites hibernating in transparent green cocoons hanging from the ceiling.
  • When Sandy tickles SpongeBob, he is not wearing his water helmet.
  • In the Russian version, the title card mistakes Andrew Overtoom as an animation director instead of Tom Yasumi.
  • There was one jellien clone behind another but they skipped him and went to Wobbles.
  • A jellien in SpongeBob's house is stuck in the cage but then escapes unreasonably.

Running gags

  • The Jelliens saying "Hold the mayonnaise."
  • The Jelliens hissing at people.


(HQ) SpongeBob ''Planet of the Jellyfish'' - Official Promo

(HQ) SpongeBob ''Planet of the Jellyfish'' - Official Promo


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