Mike and Tony Petrakis are a Greek father and son team who dive for sponges off the coast of Florida. After they are robbed by crooks, Arnold and the Rhys brothers, Mike decides to take his men to the dangerous 12-mile reef to dive for more sponges. Mike suffers a fatal accident when he falls from the reef leaving Tony to carry on the business. But now he has a companion, Gwyneth Rhys.
as Tony Petrakis
as Gwyneth Rhys
as Mike Petrakis
as Socrates Houlis
as Thomas Rhys
as Mama Petrakis
as Arnold Dix
as Sinan
as Demetrios Sofotes
as Penny Petrakis
as Griff Rhys
as Narrator (uncredited)
as Doctor (uncredited)
as Crewman of 'Snapper' (uncredited)
