Trench Ocean Maximum Depth Mariana Trench Pacific Ocean 11,034 m (36,201 ft) Tonga Trench Pacific Ocean 10,882 m (35,702 ft) Philippine Trench Pacific Ocean 10,545 m (34,596 ft) Kuril -- Kamchatka Trench Pacific Ocean 10,542 m (34,587 ft) Kermadec Trench Pacific Ocean 10,047 m (32,963 ft) Izu - Bonin Trench (Izu - Ogasawara Trench) Pacific Ocean 9,810 m (32,190 ft) Japan Trench Pacific Ocean 10,375 m (34,039 ft) Puerto Rico Trench Atlantic Ocean 8,800 m (28,900 ft) South Sandwich Trench Atlantic Ocean 8,428 m (27,651 ft) Peru -- Chile Trench or Atacama Trench Pacific Ocean 8,065 m (26,460 ft)
what is the second deepest ocean in the world
Tonga Trench