"Gummi's At Sea" is the thirty-ninth episode of the Adventures of the Gummi Bears. It premiered on December 17, 1988, and is the tenth episode of the fourth season.
Tummi finds a Gummarine, an ancient sailing vessel that can take the Gummis to New Gumbrea, where they can meet other Gummis. However, their plans are quickly derailed when Duke Igthorn captures the ship and uses it to attack King Gregor.
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