Mermaid

Devyn McDowell

— Cassie

Gavin Maddox Bergman

— Jake

Nat Faxon

— Bill

Alex Moffat

— Dr. Ablow

Mary Birdsong

— Clarita

Noah Mendes

— Rex

Ryan Mendes

— Jax

Arturo Luís Soria

— Pepper

Susan Rudick

— Principal Herron

Tom Kiesche

— Karl

Missi Pyle