Beneath the 12-Mile Reef (1953)

Divers search for sea sponges off the coast of Florida but end up robbed by crooks. With not much sponges left, robbed divers have only option in diving for more on the dangerous nearby reef. Although very rich in sponges, reef proofs to be hard place for divers, so accidents start to happen in this beautiful underwater adventure and classic tale of man versus nature.

Public Domain title.