A Mermaid's Tail is an episode of Adventure Time.


After being tricked by a couple of con-artists, four ever mermaids get legs and they turn Marceline into a mermaid causing her to lose the ability to speak English and to speak like a dolphin. Also, during the fight, they also have to face WWII enemies such as Hirihoto and Adolf Hitler.


  • Finn
  • Jake
  • Marceline
  • Mermaids
  • Glass Joe
  • Dragon Chan
  • Bear Hugger
  • Soda Popinski
  • Hirihoto
  • Adolf Hitler
  • Hernann Goenig
  • Japanese superspies
  • Beemo
  • Mounties


  • Manfred: This is all my fault. I shouldn't have never left you alone.
  • Marceline: (speaks dolphin)
  • Jake: Whoa. I guess she's trying to say it's not your fault. IT'S FINN's!
  • Marceline: (speaks dolphin)
  • Jake: I know I'm dissapointed too.
  • Hernann: (after Hitler is knocked cold) ADOLPH, speak to me!!! (whimpers)
  • Mountie: (cries) I'm a disgrace to the regiment!!! (cries more while stomping on the snow)

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