- Lieutenant Commander Philip Francis Queeg as Spongebob
- Lieutenant Barney Greenwald as Patrick
- Lieutenant Steve Marky as SpongeBob's Dad
- Lieutenant Tom Keefer as Stanley S. SquarePants
- Ensign Willis Seward "Willie" Keith as Larry the Lobster
- May Wynn as Sandy Cheeks
- Lieutenant Commander De Vriess as Captain Blue SquarePants
- Seaman as Gary the Snail
- Lieutenant commander Challee as Dr. Gill Gilliam
- Mrs. Keith as SpongeBob's Mom
- Chief Budge as Mr. Krabs
- Ensign Barney Harding as Scooter
- and more
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