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Luck is finally on my side! I'm taking the head of an S-Class hero and making it look easy!!
— Sludge Jellyfish shortly before his death.

Child Emperor vs. Sludge Jellyfish was the battle between the S-Class hero Child Emperor and the Tiger-level mysterious being Sludge Jellyfish of the Monster Association.


Child Emperor kills monsters with his poisonous gas

Child Emperor fills the prison cell Waganma is being kept in with poison to immobilize the monsters keeping watch. He uses gas masks on himself and the hostage. However, Sludge Jellyfish is revealed to be immune to poison as he appears on the ceiling.


Sludge Jellyfish oozes from the ceiling and uses his Sludge Press in an attempt to squish and poison the young hero. However, Child Emperor manages to put up a shield to protect himself from the attack, also noting that Sludge Jellyfish was immune to poisons.

Child Emperor attacking Sludge Jellyfish with his utility tools

Child Emperor takes a tool out from his backpack, and it is revealed to be a sword enveloped with energy. The young hero proceeds to hack and slash at Sludge Jellyfish, but his homogeneous body allows him to remain unaffected by the paring. Several sharp tools and drills stem out of the hero's backpack and stab at the monster, but he is still uninjured. Sludge Jellyfish proceeds to mock Child Emperor's ineffective weaponry, saying the hero has no means of killing him. He then gloats to himself, remarking that luck is on his side and that he is taking the head of an S-Class hero with ease.

Sludge Jellyfish is incinerated

However, as he is confidently monologuing, Child Emperor injects a hose into his body. Sludge Jellyfish asks what is in the hose, and Child Emperor replies that it is liquid fuel. He quickly proceeds to light a match and throws it at Sludge Jellyfish. In an instant, the Tiger-level monster is seemingly vaporized, marking Child Emperor as the victor.


Child Emperor and Waganma escape after Sludge Jellyfish is incapacitated, but their path is blocked by G5.

Sludge Jellyfish later reappears in Child Emperor's fight with the Monster Association executive Evil Natural Water and is promptly absorbed by the executive.


Monster Association Arc
Manga Chapters 78798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154
Manga Volumes
Webcomic Chapters 53 • 54 • 55 • 56 • 57 • 58 • 59 • 60 • 61 • 62 • 63 • 64 • 65 • 66 • 67 • 68 • 69 • 70 • 71 • 72 • 73 • 74 • 75 • 76 • 77 • 78 • 79 • 80 • 81 • 82 • 83 • 84 • 85 • 86 • 87 • 88 • 89 • 90 • 91 • 92 • 93 • 94
Fights Garou vs. Death Gatling's GroupGarou vs. GenosGarou vs. Bang and BombGenos, Bang and Bomb vs. Elder CentipedeKing and Saitama vs. Elder CentipedeGarou vs. Royal Ripper and Bug GodGarou vs. Royal RipperGarou vs. Unihorn, Showerhead and Super MouseGarou vs. Overgrown RoverGarou vs. Gyoro GyoroGarou vs. OrochiTatsumaki vs. Evil EyeHeroes vs. Rhino WrestlerFlashy Flash vs. Gale Wind and Hellfire FlameChild Emperor vs. Phoenix ManChild Emperor vs. Sludge JellyfishChild Emperor vs. G5Child Emperor vs. Phoenix Man: Round 2Zombieman vs. PurebloodPig God vs. The Great Food TubAtomic Samurai's Disciples vs. Do-S and Narinki's Private SquadSweet Mask vs. Do-S and Narinki's Private SquadAtomic Samurai's Disciples vs. Devil Long HairPuri-Puri Prisoner vs. BaqumaPuri-Puri Prisoner vs. Prisoners of Smelly Lid PrisonPuri-Puri Prisoner vs. NyanSuperalloy Darkshine vs. Bug GodSaitama vs. Overgrown Rover and NyanTatsumaki vs. PsykosSaitama vs. OrochiAtomic Samurai vs. G5Atomic Samurai vs. Black SpermZombieman vs. Homeless EmperorSweet Mask vs. Fuhrer UglyPig God vs. GumsAtomic Samurai's Disciples vs. Evil Natural WaterGarou vs. Puri-Puri PrisonerHeroes vs. NyanDrive Knight vs. NyanGenos vs. G5Garou vs. Superalloy DarkshineChild Emperor vs. Evil Natural WaterBang, Bomb, and Fubuki vs. Overgrown RoverTatsumaki vs. Psykos & OrochiHeroes vs. Psykos and OrochiHeroes vs. Monster Association ExecutivesGarou vs. BombGarou vs. Bang