CHAPTER TITLES: 1. Mystery Mission; 2. Attacked by Pirates; 3. Dangerous Depths; 4. Blasted By Atoms; 5. The Missing Mate; 6. Secret of the Ivory Case; 7. Captured by Savages; 8. The Vanishing Music Box; 9. Booby Trap; 10. Savage Snare; 11. Sinister Cavern; 12. Blast from the Depths; 13. Cave-In; 14. Secret of the Music Box; 15. Diamonds From The Sea.
Movie is remembered mostly for the bad guys boat that can submerge underwater.
The bad guys boat is called the "Phantom Raider".
Body count: 9