When was the first underwater color film shot?

Underwater color filming was first achieved in the 1920s, when early cinematographers began experimenting with waterproof housings and improved film stock. Color imaging was difficult underwater because water absorbs light unevenly, especially reds and oranges. Early underwater color footage was technically impressive and helped audiences see reefs and fish in a more realistic way. It also influenced marine documentary filmmaking and public interest in ocean conservation. Later advances in lighting and camera design made underwater color a standard part of marine science and media.