where the ocean keeps its hours
In the first 200 meters, sunlight still reaches. Phytoplankton drift in vast invisible clouds, converting starlight into the oxygen that fills your lungs right now. This is the zone of visibility, where everything the ocean does can be witnessed by human eyes.
The photic zone contains 90% of all marine life, yet represents less than 2% of the ocean's total volume. Almost everything we know about the sea comes from this thin, sun-touched skin of water.
Below 200 meters, the light falters. Colors disappear in sequence -- red first, then orange, yellow, green -- until only the faintest blue remains, and then nothing. Creatures here have evolved their own light. They carry lanterns made of chemistry through an eternal dusk.
Silence is not the absence of sound here. It is a pressure.
The midnight zone knows no seasons, no weather, no day.