🌊 Deep Sea

🌊Surface0 m

Where sunlight meets the sea. Most ocean life lives in the top 200 m.

🤿Recreational dive limit10 m

40 m is the deepest sport divers may go. Beyond this: decompression risk.

🐢Sea turtle50 m

Green turtles dive to about 290 m but must surface to breathe every few hours.

🐬Bottlenose dolphin100 m

Dolphins can dive past 300 m in short bursts while hunting fish.

☀️Sunlight zone ends200 m

Below 200 m, photosynthesis fails. Plants cannot grow - only drifters and hunters remain.

🏅Deepest scuba dive330 m

Ahmed Gabr reached 332 m in 2014. The descent took 12 minutes; the return, 15 hours.

🐋Blue whale500 m

The largest animal ever feeds at depth and can hold its breath for 30 minutes.

🌇Twilight zone830 m

From 200 to 1,000 m light fades to blue-black. Eyes are huge, bodies translucent.