In September 2022, scientists at the University of Western Australia and Japan on the research ship DSSV Pressure Drop undertook a two-month expedition to explore the Izu-Ogasawara trenches in Japan at 26,247 feet (8,000m), 30,511 feet (9,300m), and 23,950 feet (7,300m) deep respectively as part of a 10-year study into the deepest fish populations in the world.
