The Incredible Petrified World is currently streaming on Tubi

The Incredible Petrified World (1959)63 minAction, Adventure, Science FictionRating 31/100

Four adventurers descend to the bottom of the sea. When their surface tether snaps, they find themselves marooned in a network of underwater caverns.

Cast: John Carradine, Robert Clarke, Phyllis Coates, Allen Windsor, Sheila Noonan, George Skaff, Maurice Bernard

Director: Jerry Warren