Table 2.
Atlantic Ocean pelagic habitat volume based on hypsometry, as presented by Menard and Smith (1966). The ocean pelagic habitat has been divided vertically into five zones: epipelagic, mesopelagic, bathypelagic, abyssopelagic, and hadopelagic (Hedgepeth, 1957). The latter zone occupies a small fraction of the ocean volume and is present in the Atlantic Ocean’s Puerto Rico Trench (8400 m).| Habitat Zone | Volume 106 km3 | Percent volume in depth zones |
| epipelagic (0-200 m) | 17311.6 | 4.8 |
| mesopelagic (200-1000 m) | 64382.4 | 17.7 |
| bathypelagic (1000 - 4000 m) | 213140.0 | 58.6 |
| abyssopelagic (4000 - 7000 m) | 68859 | 18.9 |
| hadopelagic (>7000 m) | 10.0 | 0.003 |