The Twilight Zone (Mesopelagic zone)
You have now entered the twilight zone.
http://www.seasky.org/deep-sea/ocean-layers.html
Mesopelagic ZoneBelow the epipelagic zone is the mesopelagic zone, extending from 660 feet (200 meters) to 3,300 feet (1,000 meters). The mesopelagic zone is sometimes referred to as the twilight zone or the midwater zone as sunlight this deep is very faint. Temperature changes the greatest in this zone as this is the zone with contains the thermocline. Because of the lack of light, it is within this zone that bioluminescence begins to appear on life. The eyes on the fishes are larger and generally upward directed, most likely to see silhouettes of other animals (for food) against the dim light.
