Flapjack Wiki Harbor
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J.K. Simmons is the voice of Poseidon on Flapjack. He is an accomplished actor & singer in movies, tv, and on the stage. His most famous roles include J. Jonah Jameson in the Spider-Man movie franchise, Dr. Emil Skoda in various Law & Order series, and neo-nazi Vern Schillinger in HBO's critically acclaimed prison series Oz. He is also the voice of the Yellow M&M in commercials.

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