The Mariana Trench is the deepest known trench. Nobody knows how deep it is, but it is close to 35,760 - 36,089 feet (10,900 -11,000 miles), more accurate 35,798.6 feet. If you put Mt.Everest in it you would have a mile of water left.
Some animals are the Dumbo octopus, Deepsea dragonfish, Barreleye fish, Seadevil anglerfish, Goblin shark, Deepsea hatchet fish, frilled shark, Telescope octopuse, Zombie worm, Pricklefish, Crossota jelly fish.
In 1960 Jacques Piccard and Donald Wash reached the bottom. Also in 2012 James Camron went to the bottom.
B F P Z
Barreleye fish Frilled shark Pacific Ocean Zombie worm
p. 4 p.4 p.2 p.2
C G p.4
China Goblin shark S
p.2 p.4, 8
Crossota Jellyfish Guam Seadevil anglerfsh
p.4 p.2 p.2
D J T
Deepsea dragonfish Japan Telescope octopus
p.4, 8 p.2 p.2
Deepsea hatchtfish Trench
p.4 M p.3
p.4 Mt. Everest
Challenger Deep Trench
Deepest known pointe in the Mariana Trench A long narrow ditchin the ocean