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 the summer of 1930, recording deep-sea creatures that had never been observed in their natural environments. During these dives, Beebe became the first individual to notice how as one descends into the ocean's depths, certain light frequencies vanish before others, so that below a specific depth only violet and blue lights remain.