A diver is aided in his search for sunken treasure by beautiful mermaids.
| Actor | Role |
|---|---|
| GGeorge RobothamDr. Samuel Jamison (as George Rowe) | Dr. Samuel Jamison (as George Rowe) |
| GGaby MartoneLead Mermaid | Lead Mermaid |
 Timothy CareyMilo Sangster | Milo Sangster |
 Jose Gonzales-GonzalesPepe Gallardo | Pepe Gallardo |
 John MylongErnst Steinhauer | Ernst Steinhauer |
| GGil BarretoSenor Baquero | Senor Baquero |
| NNani MorrisseyMermaid | Mermaid |
| JJudy EdwardsMermaid | Mermaid |
| VVicki KantenwineMermaid | Mermaid |
| JJean CarrollMermaid | Mermaid |
| DDiana CookMermaid | Mermaid |
 Diane WebberMermaid Queen | Mermaid Queen |
| NNancy BurnsMermaid (uncredited) | Mermaid (uncredited) |
 Cathy CrowfootMermaid (uncredited) | Mermaid (uncredited) |
| KKaren GoodmanMermaid (uncredited) | Mermaid (uncredited) |