The name of the deep-sea trench located in the Western Pacific Ocean is the Mariana Trench. This trench is the deepest known part of the world's oceans, reaching depths of around 36,000 feet (10,973 meters) at its lowest point, known as Challenger Deep. The trench is a significant geological feature formed by tectonic plate subduction. Its extreme depths host unique ecosystems and species that have adapted to the harsh conditions found there, leading scientists to study its biodiversity and geological processes to better understand life in extreme environments.