Dirección: Kenneth R. Koch
Sabrina y su amiga Gwen, mientras están de vacaciones en la Gran Barrera de Coral de Australia, tratan de salvar a una colonia de sirenas secretas cuyo hábitat está amenazado por la contaminación oceánica.
Melissa Joan Hart
Sabrina Spellman
Tara Strong
Gwen
Scott Michaelson
Barnaby
Lindsay Sloane
Fin
Nick Bakay
Salem Saberhagen (voice)
Peter O'Brien
Dr. Julian Martin
Rebecca Gibney
Hilary Hexton, the Cat & Woman
Conrad Coleby
Jerome Hestor
Steve Harman
Dr. Martin's Assistant
Ben Lawson
Waiter
Victor Parascos
Helicopter Pilot
Enrico Mammarella
Resort Manager
Rachel Leigh Anderson
Barbara
Dave Nemeth
Wally Gilliams, TV Newscaster
Thom Fountain
Maitre D'
Scott McLean
Sea Wasp Crewman
Vincent B. Gorce
Bartender
Melissa Joan Hart
Sabrina Spellman
Tara Strong
Gwen
Scott Michaelson
Barnaby
Lindsay Sloane
Fin
Nick Bakay
Salem Saberhagen (voice)
Peter O'Brien
Dr. Julian Martin
Rebecca Gibney
Hilary Hexton, the Cat & Woman
Conrad Coleby
Jerome Hestor
Steve Harman
Dr. Martin's Assistant
Ben Lawson
Waiter
Victor Parascos
Helicopter Pilot
Enrico Mammarella
Resort Manager
Rachel Leigh Anderson
Barbara
Dave Nemeth
Wally Gilliams, TV Newscaster
Thom Fountain
Maitre D'
Scott McLean
Sea Wasp Crewman
Vincent B. Gorce
Bartender
Melissa Joan Hart
Sabrina Spellman
Tara Strong
Gwen
Scott Michaelson
Barnaby
Lindsay Sloane
Fin
Nick Bakay
Salem Saberhagen (voice)
Peter O'Brien
Dr. Julian Martin
Rebecca Gibney
Hilary Hexton, the Cat & Woman
Conrad Coleby
Jerome Hestor
Steve Harman
Dr. Martin's Assistant
Ben Lawson
Waiter
Victor Parascos
Helicopter Pilot
Enrico Mammarella
Resort Manager
Rachel Leigh Anderson
Barbara
Dave Nemeth
Wally Gilliams, TV Newscaster
Thom Fountain
Maitre D'
Scott McLean
Sea Wasp Crewman
Vincent B. Gorce
Bartender