- Homer Simpson as Greg Wiggle
- Moe Syzlak as Murray Wiggle
- Seymour Skinner as Anthony Wiggle
- Bart Simpson as Jeff Wiggle
- Marge Simpson as Dorothy the Dinosaur
- Abe Simpson as Wags the Dog
- Barney Gumble as Henry the Octopus
- The Sea Captain as Captain Feathersword
- Lisa Simpson as Magdalena the Mermaid
- Mr. Smithers as Sam Wiggle
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