0m
☀ Sunlit Zone
0 – 200 METRES
🐬
Bottlenose Dolphin
Tursiops truncatus
✓ SAFE ZONE

Sunlit / Epipelagic Zone

Sunlight penetrates fully here, powering photosynthesis and supporting the richest biodiversity in the ocean. Home to most marine life humans ever encounter.

DEPTH
0 – 200m
LIGHT
Full sunlight
TEMP
15° – 30°C
PRESSURE
1 – 20 atm
OTHER LIFE
Sharks, Tuna, Jellyfish
VISIBILITY
Up to 200m
PRESSURE
DIVE DEEPER
↓
200m
🌙 Mesopelagic Zone
200 – 1,000 METRES
🦑
Giant Squid
Architeuthis dux
⚠ CAUTION ZONE

Twilight Zone

Sunlight fades into dim blue twilight. No photosynthesis occurs here. Many creatures migrate vertically — rising at night to feed, descending at dawn. Bioluminescence begins.

DEPTH
200 – 1,000m
LIGHT
Faint / None
TEMP
4° – 15°C
PRESSURE
20 – 100 atm
OTHER LIFE
Lanternfish, Swordfish
VISIBILITY
Near zero
PRESSURE
GO DEEPER
↓
1,000m
🔮 Bathypelagic Zone
1,000 – 4,000 METRES
🐡
Anglerfish
Melanocetus johnsonii
✖ DANGER ZONE

Midnight Zone

Complete and permanent darkness. No sunlight ever reaches here. The crushing pressure, near-freezing temperatures and total blackness create one of Earth's most extreme environments.

DEPTH
1,000 – 4,000m
LIGHT
Zero — pitch black
TEMP
2° – 4°C
PRESSURE
100 – 400 atm
OTHER LIFE
Viperfish, Vampire Squid
BIOLUMINESCENCE
Everywhere
PRESSURE
KEEP DIVING
↓
4,000m
☠ Abyssal Zone
4,000 – 6,000 METRES
🦀
Yeti Crab
Kiwa hirsuta
☠ EXTREME DANGER

Abyssal Zone

The vast deep-sea plain. Nearly all life here relies on "marine snow" — organic particles drifting down from above. Hydrothermal vents create oases of life in total darkness.

DEPTH
4,000 – 6,000m
LIGHT
Bioluminescence only
TEMP
0° – 3°C
PRESSURE
400 – 600 atm
OTHER LIFE
Sea Cucumbers, Brittle Stars
FOOD SOURCE
Marine snow, vents
PRESSURE
ALMOST THE BOTTOM
↓
6,000m+
💀 Hadal Zone
6,000 – 11,000 METRES · MARIANA TRENCH
🐙
Dumbo Octopus
Grimpoteuthis bathynectes
💀 UNSURVIVABLE

Hadal / Trench Zone

The deepest places on Earth — ocean trenches like the Mariana Trench. The pressure here would instantly crush a human. Yet life persists: snailfish, amphipods and microbes thrive.

DEPTH
6,000 – 11,034m
LIGHT
Absolute zero
TEMP
1° – 4°C
PRESSURE
600 – 1,100 atm
OTHER LIFE
Snailfish, Amphipods
DEEPEST POINT
Challenger Deep 11,034m
PRESSURE

⚠ At Challenger Deep, pressure is 1,086 atm — equivalent to 50 jumbo jets stacked on your thumb.

11,000m
🪨 The Oceanic Crust
11,000 – 35,000 METRES · THE LITHOSPHERE
🦠
Endolithic Microbes
Subsurface extremophiles
🪨 SOLID ROCK

Oceanic Crust

Beyond the ocean water lies the solid basaltic rock of the crust. Temperatures begin to rise steadily as we descend toward the Earth's interior. Life here exists inside the tiny pores of rocks.

DEPTH
11,000 – 35,000m
MATERIAL
Basalt & Gabbro
TEMP
100° – 400°C
PRESSURE
3,000+ atm
LIFE
Endoliths
ENVIRONMENT
Porous Rock
PRESSURE
TOWARD THE MANTLE
↓
35,000m+
🔥 Upper Mantle
35,000m+ · THE ASTHENOSPHERE
🌋
Magma Flow
Semi-plastic rock
🔥 MOLTEN REALM

Upper Mantle

The boundary where rock becomes semi-plastic and begins to flow. This is the engine of plate tectonics, where intense heat and pressure create a slow-moving sea of molten silicate.

DEPTH
35,000 – 660,000m
STATE
Viscous Solid
TEMP
500° – 900°C
PRESSURE
10,000+ atm
LIFE
None (Sterile)
ACTIVITY
Convection
PRESSURE