Klaus and Marco, the German twins are two male German brothers who came to stay at Surfer's Paradise only because they thought it was a nudist hotel.
Klaus is light-skinned, and has an light orange mustache. Marco is brown-skinned, and has a dark drown mustache.
- Thanks to Reef (who was trying to pull a scam to attract more female tourists), they thought Surfer's Paradise was a nudist hotel.
- They enjoyed being naked, much to the guests' and Bummer's horror, until they felt embarrassed upon learning that Surfer's Paradise wasn't a nudist resort, and changed into their swim trunks.
- Bummer upgraded them to the Royal Suite (where Fin, Lo, Emma, and Mrs. Ridgemount had been only a few minutes earlier) to get them away from other guests.
- Reef, Broseph and Johnny got "Skin Scare" from seeing them naked.
- Slumber Party Animals (only appearance)