OCEAN MASS BENEATH YOU
0 m
1 atm · surface
0 m
Sunlight Zone
1 atm · light 100% · Photosynthesis possible
200 m
Twilight Zone
20 atm · light 1% · Bioluminescence begins
1,000 m
Midnight Zone
100 atm · light 0% · No sunlight reaches here
4,000 m
Abyssal Zone
400 atm · light 0% · Near-freezing, 1–4°C
6,000 m
Hadal Zone
600 atm · light 0% · Named for Hades
10,935 m
Challenger Deep
1,086 atm · light 0% · Deepest known point