Frogwoman (1954) Italian, cool
Just watched "Tintin", no UW very disappointing overall.
On the other hand...
Blue Water, White Death (1971) is an excellent dive documentary IMHO. Amazing footage of divers with Oceanic White Tip Sharks as well as Great Whites. Be warned there is disturbing footage of whaling and a 'bang stick' used on a shark.
Blue Water, White Death (1971) ***
Documentary quest to film Great Whites in the wild off Australia, South Africa and the Mozambique channel. Amazing UW footage, great dive documentary. This film must have been a real life inspiration for Jaws.