Ocean Twilight Zone: the Great Layer of Life @WHOI

Ocean Twilight Zone: the Great Layer of Life @WHOI

Uploaded November 2025 | Updated September 2026, 2 hours ago

Where do the most animals on Earth live? The answers are lurking beneath the waves.

Get to know our ocean planet through our new web experience: go.whoi.edu/ocean-world

© Woods Hole Oceanographic Institution

Ocean Twilight Zone: the Great Layer of Life

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Ocean Twilight Zone: the Great Layer of Life