The pressure is the first thing that changes. It doesn’t just weigh on your chest; it settles into your thoughts, thickening them like silt. Above, the world is a riot of blue and gold, of wind that carries the scent of salt and the cry of gulls. But as you descend, the light doesn't just fade—it retreats. It pulls back toward the surface, leaving you in a realm of indigo, then ink, then nothing.

Deeper still, there is the silt. The "marine snow." A constant, ghostly rain of organic dust—fragments of shells, flecks of bone, the dust of a thousand years of life—drifting down to settle on the abyssal plain. It is the world’s longest-running record of what has passed. And then, there are the things that don't belong to nature.

At sixty feet, the colors vanish. Red is the first to go, bleeding out into a bruised grey. By two hundred feet, you are a ghost in a blue room. The silence here isn't empty; it’s heavy. It’s the sound of a billion tons of water holding its breath.