Greek sponge divers in Tarpon Springs, Florida duel over diving methods and fight over the same girl, and only one will survive.
| Actor | Role |
|---|---|
 Russell HardieJohn 'Johnny' Kaminas | John 'Johnny' Kaminas |
 Ben LyonSteve Londos | Steve Londos |
 Ann RutherfordHelen Pappas | Helen Pappas |
 Irving PichelAlex Fotakis | Alex Fotakis |
 Fritz LeiberGregory Pappas | Gregory Pappas |
 Vince BarnettHector | Hector |
 Maurice MurphyLuis | Luis |
 Nigel De BrulierDemetrius | Demetrius |
 Paul PorcasiVasilios | Vasilios |
 Victor PotelAndy | Andy |
 Karl HackettJoe | Joe |
| FFrancisco MaránGeorge | George |
 Frank YaconelliPete | Pete |
| MMike TellegenCimos | Cimos |
 John PicorriGreek Proprietor | Greek Proprietor |