A teen learns that his birth mother is a mermaid after he begins to grow fins and slimy scales on his thirteenth birthday.
| Actor | Role |
|---|---|
 Chez StarbuckCody Griffin | Cody Griffin |
| JJustin Jon RossJess Wheatley | Jess Wheatley |
 Courtnee DraperSam | Sam |
 Brent BriscoeBig John | Big John |
| TTim RedwineSean Marshall | Sean Marshall |
 Dave CoulierWhit Griffin | Whit Griffin |
 Lisa StahlSharon Griffin | Sharon Griffin |
 Kristen StewartGirl in Fountain Line (uncredited) | Girl in Fountain Line (uncredited) |
 Brian HaleyCoach | Coach |
 Karen MaruyamaMrs. Nelson | Mrs. Nelson |
 Regan BurnsJoe | Joe |
 Joel McKinnon MillerHal | Hal |
 Richard TannerDoctor Schwartz | Doctor Schwartz |
| CCameron CurtisTodd | Todd |
| CCraig HauerZach | Zach |
| SSarah Elizabeth CombsHeather | Heather |
 Brian PalermoStarter #1 | Starter #1 |
| CCarl ReggiardoStarter #2 | Starter #2 |
 Maliabeth JohnsonSmitten Girl | Smitten Girl |
| LLauren EckstromSpirited Girl | Spirited Girl |
 David ReiversMath Teacher | Math Teacher |
| VVincent BowmanTroublemaker | Troublemaker |
 Anna BergerIrate Tourist | Irate Tourist |
| KKen TiptonPete | Pete |
| SStephanie Chantel DurelliMermaid | Mermaid |