What are the five zones of the ocean and what survives in each?
Below the sunlit surface lies a series of increasingly alien worlds, each with its own unique inhabitants.
The answer
The ocean is divided into five vertical zones: the sunlight zone (0-200 meters) where most marine life and all photosynthesis occurs; the twilight zone (200-1,000 meters) where faint light persists and bioluminescence dominates; the midnight zone (1,000-4,000 meters) of complete darkness inhabited by anglerfish and giant squid; the abyssal zone (4,000-6,000 meters) where near-freezing temperatures and immense pressure prevail; and the hadal zone (6,000-11,000 meters) found only in deep trenches, where specially adapted amphipods and bacteria endure pressures over 1,000 atmospheres.
Source: NOAA
- ocean zones
- deep sea
- marine biology
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