George Robotham

Dr. Samuel Jamison (as George Rowe)

Diane Webber

Mermaid Queen

Gaby Martone

Lead Mermaid

Timothy Carey

Milo Sangster

Jose Gonzales-Gonzales

Pepe Gallardo

Jack Mylong-Münz

Ernst Steinhauer

Gil Barreto

Senor Baquero

Nani Morrissey

Mermaid

Judy Edwards

Mermaid

Vicki Kantenwine

Mermaid

Jean Carroll

Mermaid

Diana Cook

Mermaid

Nancy Burns

Mermaid (uncredited)

Cathy Crowfoot

Mermaid (uncredited)

Karen Goodman

Mermaid (uncredited)

John Lamb