<human>:  What is the deepest ocean trench and what creatures live there?
<bot>: The deepest ocean trench is the Mariana Trench which is about 10,994 metres below sea level. Several species of deep-sea fish, hagfishes, isopods, amphipods, and squid have been found living in this environment. Sharks, jellyfish, and anemones also inhabit this extreme underwater environment.