The Marvelous Misadventures of Flapjack - Season 2 - Eps 20: Under the Sea Monster
When Flapjack pulls a sea monster-related prank on K'nuckles the citizens of Stormalong banish him from the harbor by throwing him into the ocean, leaving Flapjack to try to get him back.
About The Marvelous Misadventures of Flapjack

Title: The Marvelous Misadventures of Flapjack
First Air Date: 2008-06-05
Last Air Date: 2010-08-31
Status: Ended
Rating: 8.064/10 (from 345 votes)
Language: EN
Seasons: 4
Total Episodes: 90
Network: Cartoon Network
Genres: Sci-Fi & Fantasy, Comedy, Animation
Production Companies: Cartoon Network Studios
Synopsis
A young boy who grew up inside a talking whale sets sail for magical Candied Island, accompanied by Capt. K'nuckles, a crusty old pirate.
Cast

Thurop Van Orman
Flapjack (voice)

Brian Doyle-Murray
Captain K'nuckles (voice)

Roz Ryan
Bubbie (voice)

Jeff Bennett
Peppermint Larry (voice)

Steve Little
Doctor Barber (voice)

Richard McGonagle
Eight-Armed Willy

S. Scott Bullock
Patch

Daran Norris
Dock Hag

Kevin Michael Richardson
Sea Urchins