5 Ocean Zones 11,000 Meters Down

Scroll Down.
Go Deeper.
Meet the Deep.

A scroll-driven journey through all five ocean zones — from sunlit surface to the crushing hadal deep, with creatures to discover at every depth.

Begin the Descent Explore All Zones
Surface
11,000 m
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Your Journey

Five Worlds. One Ocean.

Each zone is its own world — different pressure, temperature, light, and life. Scroll through all five.

1
Sunlight Zone Epipelagic

0 – 200 meters
2
Twilight Zone Mesopelagic

200 – 1,000 meters
3
Midnight Zone Bathypelagic

1,000 – 4,000 meters
4
Abyssal Zone Abyssopelagic

4,000 – 6,000 meters
5
Hadal Zone Hadalpelagic

6,000 – 11,000 meters
01
Epipelagic · 0 – 200 meters

Sunlight Zone

Sunlight floods these upper waters, fueling the food chains that support nearly all ocean life. Coral reefs, kelp forests, and open-water hunters all live here.

🐬

Bottlenose Dolphin

0–150 m

Uses echolocation — sending clicks that bounce off prey — to hunt fish in murky waters.

Echolocation
🦈

Whale Shark

0–200 m

The largest fish on Earth, yet it eats only the smallest things: plankton and tiny fish eggs.

Filter feeding
🐢

Sea Turtle

0–180 m

Can hold its breath for up to 7 hours while sleeping on the ocean floor.

Slow metabolism

Deep Fact

90% of all marine life lives in the sunlight zone, despite it being only 2% of the ocean.

Go deeper Twilight Zone
02
Mesopelagic · 200 – 1,000 meters

Twilight Zone

Light fades to a ghostly blue glow. Animals here migrate vertically every day — rising to feed at the surface each night, then descending before dawn.

🦑

Vampire Squid

600–900 m

Despite the name, it eats only drifting dead matter — marine snow — falling from above.

Marine snow feeding
🐟

Lanternfish

200–1,000 m

Photophores (light organs) on its belly match the faint light from above, making it nearly invisible to predators.

Counter-illumination
🐠

Hatchetfish

200–600 m

Its wafer-thin, silver body reflects light in all directions — like a living mirror that vanishes in the dark.

Mirror camouflage

Deep Fact

Twilight zone fish perform the largest daily animal migration on Earth — billions of tons of creatures moving up and down every night.

Go deeper Midnight Zone
03
Bathypelagic · 1,000 – 4,000 meters

Midnight Zone

Total darkness. No sunlight reaches here. Animals make their own light — bioluminescence — to hunt, attract mates, and lure prey into their mouths.

🎣

Anglerfish

1,000–4,000 m

Dangles a glowing lure from its forehead. When curious fish swim close to investigate, they become dinner.

Bioluminescent lure
🦑

Giant Squid

300–1,000 m

Has the largest eyes of any animal on Earth — up to 30 cm wide — to detect the faintest glimmers of light.

Giant eyes
✨

Firefly Squid

200–1,200 m

Over 1,000 tiny photophores cover its body, creating complex light patterns used to communicate with other squid.

1,000 photophores

Deep Fact

Over 75% of deep-sea animals produce their own light. Bioluminescence is the most common form of communication on Earth.

Go deeper Abyssal Zone
04
Abyssopelagic · 4,000 – 6,000 meters

Abyssal Zone

The pressure here would crush a car like a tin can. Yet life persists — strange, slow, and remarkably resilient. Most food arrives as "marine snow": dead particles drifting down from above.

🥒

Sea Cucumber

4,000–6,000 m

Makes up over 90% of animal biomass on some abyssal plains. Slowly vacuums up sediment to digest the tiny nutrients inside.

Sediment feeding
🐙

Dumbo Octopus

3,000–7,000 m

Named for ear-like fins that flap like elephant ears. The deepest known octopus, spotted at 7,000 meters.

Ear-like propulsion
🪱

Zombie Worm

4,000–5,000 m

Drills into whale bones using acid it produces from its own skin — unlocking nutrients locked inside the skeleton.

Acid drilling

Deep Fact

The abyssal plain covers more than 50% of Earth's surface — it's the most extensive habitat on the planet, and we've explored less than 0.1% of it.

Go deeper Hadal Zone
05
Hadalpelagic · 6,000 – 11,000 meters

Hadal Zone

The deepest places on Earth: ocean trenches carved by tectonic forces. The pressure is 1,000 times greater than at the surface. Scientists once thought nothing could survive here. They were wrong.

🐡

Hadal Snailfish

6,000–8,336 m

The deepest fish ever found — at 8,336 meters — it has no scales, translucent skin, and proteins that keep working under crushing pressure.

Pressure-resistant proteins
🦐

Amphipod

0–11,000 m

Shrimp-like scavengers found at the very bottom of the Mariana Trench. They gather in massive swarms to devour any food that falls to the floor.

Extreme pressure tolerance
🔬

Foraminifera

0–11,000 m

Single-celled organisms with intricate shells. Their fossils in trench sediment tell us about Earth's climate millions of years ago.

Single-cell survival

Deep Fact

Mount Everest (8,849 m) would fit entirely inside the Mariana Trench (10,935 m) — with over 2 kilometers of water above its peak.

The Numbers Are Staggering

The ocean is Earth's greatest unknown. Here's what we do know.

71%

of Earth covered by ocean

95%

of the ocean unexplored

228,000+

known ocean species

10,935 m

deepest point on Earth

For Grades 4–7

Learning by Descending

No login. No prep. Open the browser and start exploring. Fathom is built for curious kids and the teachers who inspire them.

01
🌊

Start at the Surface

Begin in the warm sunlit waters. See familiar creatures. Feel the ocean come alive before you scroll an inch.

02
🔦

Descend Zone by Zone

Each scroll takes you deeper. The page darkens as you go. Creatures glow. Facts appear. The journey IS the lesson.

03
🔬

Discover & Remember

Clickable creature cards reveal surprising adaptations. By the time you hit the hadal zone, you've learned an ocean.

10,935 meters deep

You Made It
to the Bottom.

Most humans never experience the hadal zone. You just did. Share Fathom with the next curious explorer in your life.

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