On May 6, after finishing exploration of the seafloor, we conducted a series of midwater transects from 1,400 to 300 meters (~4,595 to 985 feet). These transects increase our knowledge about the largest, yet one of the least understood, biomes on Earth. The dive took place in the Jarvis Unit of the Pacific Remote Islands Marine National Monument, which is one of the few units of the monument where the water column is protected in addition to the seafloor.