The bathypelagic zone, from 1,000 to 4,000 meters, is a realm of complete darkness. No sunlight reaches these depths, and the pressure is immense — up to 400 atmospheres. Yet life persists. Bioluminescent organisms create their own light through chemical reactions, producing eerie flashes and glows in the darkness. Giant squid, anglerfish with their luminous lures, and vampire squid — a living fossil — inhabit these waters. Food is scarce, arriving mainly as "marine snow" — a constant rain of organic particles drifting down from above.