Sixteen Fathoms Deep is a 1934 American film directed by Armand Schaefer and starring Lon Chaney Jr, Sally O'Neil and Russell Simpson. It was an early leading role for Chaney, then billed under his birth name "Creighton Chaney".
A sponge diver, Joe Bethel, hopes to make enough money to buy his own boat and marry his fiancée, Rosie. He must deal with a villainous fellow diver, Savanis.
O'Neil made the film after missing out on the role in Sitting Pretty (1933) to Ginger Rogers.
The New York Times called Sixteen Fathoms Deep a "good swaggering specimen" of action melodrama, "exciting, plausible and a lot of fun."