Ocean zone
Hadal Zone
Hadalpelagic · 6,000–11,000 m
Reference answer
The trench zone: narrow, extremely deep habitats with specialized communities and the ocean’s highest pressures.
LightNo sunlight
TemperatureJust above freezing
Pressure at base≈ 1101 atm
Defining conditions
- Extreme pressure
- Steep trench topography
- Food can collect along trench floors and slopes
Representative creatures
Evidence
Sources reviewed
- Hadal zoneWoods Hole Oceanographic Institution · checked 2026-07-30
- What is the deepest-living fish?NOAA Ocean Exploration · checked 2026-07-30