Imagine taking an ocean voyage. But instead of going around the world, you travel straight down to the bottom of the ocean.
On your trip, you pass through the five distinct layers of the ocean. You go from sunny to pitch-black. The water goes from warm to ice-cold and from active to still. At first there’s almost no pressure, and at the bottom, it’s bone-crunching pressure. While some sea creatures live in several zones, others can live in only one zone.
