SpongeBob SquarePants

Planet of the Jellyfish

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Episode Information [edit]
Planet of the Jellyfish
Season №: 8
Episode №: 169b
Airdate: March 31, 2012 (USA)
June 8, 2012 (Canada)
Sister episode(s): "Are You Happy Now?"
Writer(s): Luke Brookshier
Marc Ceccarelli
Doug Lawrence
Supervising Producer: Paul Tibbitt
Storyboard: Luke Brookshier
Marc Ceccarelli
Animation: Tom Yasumi
Creative: Vincent Waller
See all credits for this episode.
Previous: "Are You Happy Now?"
Next: "Free Samples"
List of episodes

"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.



It starts out as a happy day for jellyfishing at Jellyfish Fields. SpongeBob and Patrick are catching jellyfish when SpongeBob says that if they would not sting, they would be perfect pets. 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 jellion, a jellyfish with large black eyes. The jellion is commanded to engulf someone as the Jellion King spits out more jellions. Patrick goes to take a nap, with the jellion following him. As Patrick naps, the jellion 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 Jellion Patrick, which is Patrick but with large black eyes, same as the jellion. Patrick uses his blue mouth tentacles to pick up his net as SpongeBob catches the jellion. Jellions swarm into Jellion Patrick's net, and then Jellion Patrick gets an idea to turn everyone in town into jellion people by giving them jellions.


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

The next morning, SpongeBob puts the Jellion into a cage as he leaves for work. It escapes, and consumes Gary as he sleeps and the plant next to him. His tentacle spits out another small pile of goo, which reveals a Jellion Gary-plant hybrid. The scene switches to the Krusty Krab which is completely filled with Jellion Bikini Bottomites, except for one man. The Jellion Bikini Bottomites order Krabby Patties "hold the mayo" until the man who wasn't a jellion person orders a Krabby Patty with extra mayo. Jellion Mr. Krabs comes and says that they were "out of the condiment called mayo," and he places a jellion on the guy's head. SpongeBob thought that was weird, because the Krusty Krab had a fresh wall of mayo in the freezer. SpongeBob told Jellion Patrick (who was operating the grill) that he was getting mayo for the guy's patty. Patrick turned his head around, his torso still facing the grill, yelled "NO MAYNAISE!!", then his mouth tentacles consumed the patty. SpongeBob went to the freezer and grabbed a box of mayo, then he looked through the peephole. It showed everyone in town, minus Sandy, hibernating in transparent green cocoons hanging from the ceiling, as the Jellion King commanded his jellions (on either side of him) to do stuff for him.

SpongeBob realized that something was very wrong. SpongeBob was ordered by Jellion Mr. Krabs to take a nap. SpongeBob flees from the Krusty Krab, with several Jellion Bikini Bottomites chasing him. SpongeBob is captured and kidnapped by Sandy. Sandy tickled him, and he giggled, showing he was not a jellion clone. They figured out that the jellion's weakness was mayo, since they ordered food with no mayo. They then exited with sunglasses with lens that looked like jellion eyes. Unfortunately, when joking in front of Jellion Mr. Krabs, SpongeBob elbowed Sandy, knocking off her sunglasses, and Jellion Mr. Krabs shouts "IMPOSTER," which knocked off SpongeBob's glasses. SpongeBob quickly grabbed a mayo sprayer and destroyed the entire town of Jellion clones. When a clone was destroyed, the real person of the clone awakened, and the cocoon they were trapped in disintegrated.

SpongeBob and Sandy find the hideout, containing every Bikini Bottomite cowering in fear. SpongeBob destroys one side of the Jellion King's jellions, but the mayo starts to freeze. SpongeBob tosses the mayo from the jar, but it freezes as well and lands in between the Jellion King's eye stems. Sandy turns up the heat, and the mayo melts, destroying the Jellion King. The remaining several jellions, not hit by mayo, then pop like bubbles. SpongeBob explained everything, which took eleven minutes. Patrick tastes the jelly and compliments it as relish. Soon, the goo remaining from the clones and jellions was sold as Evil Clone Jelly Relish for $4 extra than regular Krabby Patties. Patrick then orders a Krabby Patty with Jelly Relish, 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 - Jeremy Wakefield ["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 - 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 - Jeremy Wakefield [SpongeBob goes to bed]
  Desolate Lands - Harry Lubin ["I can't sleep."]
  Some Things To Know About Monsters - Eban Schletter, Jill Sobule [SpongeBob watching a horror movie]
  Solo Steel - Jeremy Wakefield [the next morning]
  Lost in the Galaxy (#35) - Harry Lubin [Gary is cloned]
  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 - Harry Bluestone, Emil Cadkin [clones hiss at a customer]
  Dark and Scary - Harry Lubin [jellien Patrick cooking patties]
  Evil Alien Attack 1 - Harry Bluestone, Emil Cadkin [jellien leader in the freezer]
  Twilight Zone - Harry Bluestone, Emil Cadkin [jellien clones chase SpongeBob]
  Creeping Up 29 - 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 - Harry Bluestone, Emil Cadkin ["IMPOSTERS!"]
  Evil Alien Attack 1 - 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]
  Sailor's Sting 11 - 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?]



  • Eleven Minutes Later
  • SpongeBob called Jellion Harold "Bill" Reginald "Random Guy." This is a reference to the fact that Harold is a "background character" on the show.
  • This episode breaks the fourth wall in a way when SpongeBob explains the whole story to everyone; the time card says "Eleven Minutes Later" which is also the length of this episode. Others include "Nature Pants," "Missing Identity," and "Club SpongeBob."
  • This is the only known episode of the Jellions.
  • SpongeBob's spatula is cloned even though it is not alive. However, in "All That Glitters," SpongeBob's spatula is indeed alive and in "The Curse of Bikini Bottom," when he snapped his spatula in half, it had a ghost.
  • Running Gags: The Jellions saying "Hold the mayonnaise," and hissing at people.
  • The Jellions left the mayo boxes to cover their activities even though that is their weakness. SpongeBob could have gotten more mayo to fill the mayo dispenser before it froze.
  • The Jellion that Jellion Mr. Krabs puts on the customer was probably female since it had eyelashes. That was the only female Jellion in the episode since all the others did not have eyelashes.
  • Not counting Jellion Squidward, this is one of few episodes where Squidward appears but does not have any lines.
  • It is revealed in this episode that mayonnaise is another thing that can be added to a Krabby Patty as the Jellions ordered Krabby Patties without mayonnaise and the normal customer wanted extra mayonnaise.
    • Even still, the mayonnaise is still not shown to be put on a Krabby Patty in this episode.
  • It is unknown what Plankton was doing during this episode since he lives right across the Jellion infested Krusty Krab.
  • The title card background is similar to the planet that SpongeBob and Squidward were teleported to in "SquidBob TentaclePants."
  • When the Jellion got Gary, Gary's shell colors swapped.
  • Because Gary was next to a plant when he got jellified, the clone was a hybrid of plant mixed with Gary.
  • Squidward was nott seen being cloned by the Jellion. Jellion Patrick just shoved it through Squidward's door and the goo is then spat out and morphed into Jellion Squidward.
  • When SpongeBob discovers the Jellion plot, he says "This is just like that movie I saw last night!" Since the episode is an obvious parody of the classic horror film Invasion of the Body Snatchers, it is likely that is the movie SpongeBob watched the night before.
    • This implies that the characters watch the same movies as we do. How that is possible is unknown.
  • In the original airing, this episode aired first, while "Are You Happy Now?" aired second (possibly because this segment was more heavily advertised). In later airings, the episode order is reversed.
  • This episode premiered on the same day as the 2012 Kids' Choice Awards.
  • This is the fourth time that an episode premiered on Kids Choice Night. The first was "Help Wanted"/"Reef Blower"/"Tea at the Treedome" in 1999 and the second was "Krusty Towers"/"Mrs. Puff, You're Fired" and the third was "Sentimental Sponge" in 2011.
    • This is also the second time an episode premiered before the KCAS ("Help Wanted" premiered after the KCAS).
  • This episode "premiered" twice on March 31, 2012 (10am for an initial airing and then at 7:30pm, right before the 2012 KCA's).
  • This episode premiered five years after the premiere of "Born to Be Wild" and "Best Frenemies."
  • On the DIRECTV info guide for this episode, Jellion is accidentally spelled as "Jellien."
  • Even though SpongeBob and Sandy eliminate all of the Jellions and save everyone at the Krusty Krab, the one character still never to be saved by SpongeBob and Sandy is Gary. He was never mentioned or shown again in the episode.

Cultural references

  • This episode is a parody of Invasion of the Body Snatchers.
  • When Patrick opens his mouth and tentacles come out, it is a possible reference to the Zalgo Garfield internet comics.
  • The title is an easy reference to Planet of the Apes.


  • When SpongeBob first walked into the Jellion infested Krusty Krab and noticed a line of customers, there were two Jellion Clones in front of the normal fish. After the first Jellion Clone finished his order, the normal fish came up next, actually skipping the second Jellion Clone.
  • When Jellion Squidward tried to give SpongeBob a Jellion, it also had eyelashes just like the one Jellion Mr. Krabs gave to the customer. However, after SpongeBob leaves and Jellion Squidward still had the Jellion, its eyelashes are gone.
  • When SpongeBob first walked out of the Krusty Krab and bumped into Jellion Harold, he had his Krusty Krab hat on. However, in the next shot when SpongeBob was running from the group of Jellion Clones, his hat was missing. And finally, in the third shot after SpongeBob came from behind the rock, his hat was suddenly on again.
  • It is unknown why the Jellion Clones put the mayonnaise SpongeBob used in the freezer if it is their weakness.
  • When SpongeBob told Jellion Patrick (whom he thought was the real Patrick) that he needs a Krusty Krab hat, Jellion Patrick literally grew one on his head. When SpongeBob first mentions he is going to get mayonnaise, if one looks real carefully, Jellion Patrick's hat actually moves when he turns around saying "NO MAYONNAISE!" The hat shouldn't move since if Jellion Patrick grew it on his head, the hat should be a part of his body.
  • When Jellion Squidward pointed out the normal fish wanting mayonnaise on his Krabby Patty, the Patty was still on the tray. When SpongeBob took the Krabby Patty from Jellion Squidward to go and have mayonnaise put on it, the Patty was suddenly on a small plate.
  • Throughout the episode, Jellion Patrick's belly button keeps disappearing.
  • Just before Gary is engulfed by a Jellion, his shell inverts colors in between scenes.

    Gary error in Planet of the Jellyfish

    • This might be implying that Jellions have some level of difficulty maintaining the exact shape of an individual.
  • At the end of the episode, when Spongebob walks out of the kitchen with Patricks patty, his pants are a different shade of brown then usual.
  • Gary was not seen in the freezer with the rest of the Bikini Bottomites hibernating in transparent green cocoons hanging from the ceiling.

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