SpongeBob SquarePants

Planet of the Jellyfish

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Episode Information
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. SpongeBob and Patrick are catching jellyfish when SpongeBob says that if they wouldn't 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. Jellion #1 is commanded to engulf someone as the Jellion King spits out more jellions. Patrick goes to take a nap, with Jellion #1 following him. As Patrick naps, Jellion #1 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 moth tentacles to pick up his net as SpongeBob catches Jellion #1. Jellions swarm into Jellion Patrick's net, and then Jellion Patrick gets an idea to give his jellions to everyone in town.

Later, SpongeBob and Jellion Patrick arrive at Squidward's house. Jellion Patrick stuffs his last jellion into Squidward's mail slot, then 1 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 wish SpongeBob a good night. SpongeBob sleeps cozily in his bed, as Jellion #1 attempts to consume him, but SpongeBob awakes, with insomnia. As he watches a late movie, Jellion #1 tries again to consume him, but SpongeBob throws popcorn into Jellion #1's mouth. Jellion #1 starts choking on the popcorn, falling behind the couch.

The next morning, SpongeBob puts Jellion #1 into a cage as he leaves for work. Jellion #1 escapes, and consumes Gary as he sleeps next to a plant and the plant. His tentacle spits out another small pile of goo, which reveals a Jellion Gary-plant hybrid. The scene switches to the Krusty Krab, 99% filled with Jellion Bikini Bottomites, except for one man. The jellions order Krabby Patties "hold the mayo" until the guy who wasn't a Jellion 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, and his mouth tentacles consumed the patty. SpongeBob went to the freezer and grabbed a box of mayo, when 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 wasn't a jellion clone. They figured out that the weakness was mayo, since Jellions 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 disintegrated.

SpongeBob and Sandy found the hideout, containing every Bikini Bottomite cowering in fear. SpongeBob destroyed one side of the Jellion King's jellions, but then the mayo started to freeze. SpongeBob tossed the mayo from the jar, but it froze and landed in between the Jellion King's eye stems. Sandy turned up the heat, and the mayo melted, destroying the Jellion King. The remaining several Jellions, not hit by mayo, then exploded. SpongeBob explained everything, and 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 - Harry Lubin [title card]
  Honolulu March - Hans Haider [opening at Jellyfish Fields]
  Wailing Theremin 2 - Harry Lubin ["Does Jellyfish Fields seem different today?"]
  ? ["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 - Harry Bluestone, Emil Cadkin [Squidward is cloned]
  ? [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]
  ? [the next morning]
  Out of the Crypt - Harry Lubin [Gary is cloned]
  ? [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]
  Undercover - Harry Bluestone, Emil Cadkin [SpongeBob is dragged into Sandy's treedome]
  ? - Jeremy Wakefield [Sandy tickles SpongeBob]
  Lost in the Galaxy - Harry Lubin ["So you don't like mayo... just like a jellien!"]
  Shock Happening 1 - Harry Lubin ["We'll never get past... THEM!"]
  ? [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]
  ? [Krabs gets an idea]
  ? - Michael Bolger, Nicolas Carr [Krabs selling relish patties]
  Out of the Crypt - Harry Lubin [The End?]


  • Eleven Minutes Later
  • The End?
  • SpongeBob called Jellion Harold "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 and Missing Identity, and Club SpongeBob.
  • This is the only known episode of the Jellions.
  • Running Gags: The Jellions saying "Hold the mayonnaise." and hissing at people.
  • SpongeBob's spatula is cloned even though it isn't even alive. Though, 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.
  • Why didn't the Jellions hide the jug of mayonnaise like they did the boxes of mayonnaise instead of leaving it right out in the open?
  • On the DIRECTV info guide for this episode, Jellion is actually spelled as "Jellien."
  • The Jellion that Jellion Mr. Krabs put on the customer was probabilty female since it had eye lashes. That was the only female Jellion in the episode since all the others didn't have eye lashes.
  • Not counting Jellion Squidward, this is one of few episodes where Squidward appears but doesn't 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 is 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.
    • This is because Gary was lying right next to a plant, making him a Plant\Gary hybrid.
  • 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.
  • Squidward wasn't 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.
  • Even though Spongebob and Sandy eliminate most Jellion's 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 again or showed in the episode and the Jellion that was staying at spongebobs was never mentioned or shown in the episode again.
  • This episode premiere the day of 2012 Kids Choice Awards and this is 3rd time the episode premiere at Kids Choice Awards, the first was Help Wanted, the second was Krusty Towers, and the fourth will be Kenny the Cat.

Cultural References

  • This episode is a parody of Invasion of the Body Snatchers.
  • The title is a reference to Planet of the Apes.


  • When SpongeBob first walked into the Jellion infested Krusty Krab and noticed a line of customers, there was 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 eye lashes just like the one Jellion Mr. Krabs gave to the customer. However, after SpongeBob leaves and Jellion Squidward still had the Jellion, its eye lashes are gone.
  • 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.
    • This might be implying that Jellions have some level of difficulty maintaining the exact shape of an individual.

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