Beebe and Barton conducted several successful dives during the summer months of 1930, documenting deep-sea animals which had never before been seen in their native habitats. During these dives, Beebe became the first person to observe how as one descends into the depths of the ocean, some frequencies of sunlight disappear before others, so that below a certain depth the only colors of light that remain are violet and blue.
Beebe and Barton carried out several successful dives during 1930's summer months, documenting deep-sea animals that had never been seen in their natural habitats. Throughout these expeditions, Beebe was the first to observe how as one descends into the ocean depths, certain light frequencies disappear before others, leaving only violet and blue lights visible below a specific depth.